This turned into way, way too big of a comment, but I'm on jailbroken iOS 13.3 right now and love it. It's not like the Old Days where tweaks often added huge new pieces of functionality, and that seems to make many people say jailbreaking is no longer worth it. For me it's more like a bunch of very small usability improvements that add up to make my phone much much more pleasant, polishing its usability to perfection. My favorite iOS 13 tweaks are, in no particular order:

- "powerlogHelperdFix": Listing this first because it's the only workaround I needed for a bug in the jailbreak, to fix the Battery stats Settings pane.

- "AlarmVolume": Custom (read: very loud) volume for my wake-up alarm, separate from the normal volume setting that I like to leave low or muted. Similar to how Android allows separate volume settings for calls / notifs / alarms: https://i.imgur.com/dV4URQT.jpg

- "Mega-Untrusted-Hosts-Blocker IPv4+IPv6": Adblocking hosts file for web content in all apps that works on mobile data or any random Wi-Fi network where you don't have an adblocking DNS server.

- "TwitterNoAds" + "AlwaysLatestTimelineTwitter": Blocking promoted tweets and forcing reverse-chronological feed (as opposed to algorithmically-sorted-feed) in the Twitter app.

- "AlwaysLow": Make my phone willing to always stay in Low Power Mode instead of turning LPM off once charged past 80%: https://i.imgur.com/wgn7Lj9.jpg

- "A-Font", "Noctis Neo", "ColorBadges", "iPadStatusBar13", "Cuboid": System UI customization. No real need; just to keep things fresh by changing up every once in a while. https://i.imgur.com/7Iy0gUs.jpg

Currently: https://i.imgur.com/1lbe3I2.jpg

- "Jellyfish": Customizable replacement for the standard lock screen. https://i.imgur.com/oQSaSl9.jpg

Currently: https://i.imgur.com/kQ0ITWC.jpg

- "Clean Home Screen" + "FDots": Hide tiny UI annoyances like the blue Recently-updated-app dots, the text reminding me that I have to unlock my phone to use it, the text reminding me of what the Notification Center is, etc: https://i.imgur.com/x34If3d.jpg

- "StopPlayin12'": Stops the Apple Music app from auto-playing any time a bluetooth device (like my car) reconnects to my phone. I usually use a third-party music app, but iOS only ever wants to start the built in player. I still have to go manually start the app I want, but at least I get to do it in silence: https://i.imgur.com/90JPuqa.jpg

- "System Sound Disabler": Truly disable excessive UI sound effects so I can leave my volume up and not have to hear them: https://i.imgur.com/nTOrgH1.jpg

- "AskBeforeCalling Too 13": Prevent accidental pocket-dials by adding a confirmation dialog to any action that would initiate a call/text/whatever: https://i.imgur.com/3vw5fkw.jpg

- "NoAutoStraighten", "NoDNDBanner", "NoLowPowerAlert", "NoMoreSuggestions", "NoMoreSkinToneSuggestions", "NoNCHeaderView", "NoYellowBattery", "AppStoreUpdatesTab13", "Ultrasound", etc: Lots of small single-purpose UI tweaks that often don't even need settings panes.

- "NoYTNo" + "Youtube Tools": Automatically dismiss the constant Youtube Premium upsells when you open the app, re-enable background playback support, block ads in Youtube videos, etc.

- "NXBoot": Jailbreak my exploitable Nintendo Switch with any boot code using Apple's USB3 Lightning Camera Adapter: https://i.imgur.com/pySTOVO.jpg

- "RealCC": Reverts the Control Center Wi-Fi/BT toggles to their pre-iOS-11 functionality of fully disabling the associated radios instead of merely disconnecting your WiFi until 3AM the next morning like it does now.

- "DNDMyRecording": Automatically enables Do Not Disturb mode when taking a screen recording so unwanted notifications don't end up in your video.

- "GoodWifi": Display saved passwords for known Wi-Fi networks, display base station MAC, display true signal values, etc: https://i.imgur.com/xSVLhFU.jpg

- "DLEasy": Video downloader for all social media apps, including Reddit-style DASH/HLS segmented videos: https://i.imgur.com/IU1ZFWf.jpg

- "CopyLyrics" + "YTCopyDescription": Allows you to copy the plain text from the lyrics pane in Apple Music or the description of a video in the YouTube app.

- "Keyboard Accio": Makes the 'Globe' button on the keyboard only switch between the first two keyboards in my list of enabled keyboards, so I can leave several enabled without making it a tedious process to get through them all back to QWERTY. The full list is still available via a long press.

- "iKeyWi 4": Total layout customization for the standard keyboard without having to replace it with a third-party keyboard. I keep the layout pretty much the same aside from adding a fifth row of keys up top for a permanent number row: https://i.imgur.com/OQ0ITve.jpg https://i.imgur.com/Nj2UMQ7.jpg

- "Filza" + "Safari Plus": A fully-fledged graphical file manager that makes a great pairing with a tweak that gives Safari a native download manager: https://i.imgur.com/IoWrHKn.jpg

I'm sure most (if not all) of these probably sound unnecessary to many people, but I love feeling in control of my own phone instead of the other way around :)