If you're an internet user, chances are you've come across the acronym TLDR at some point. For those who don't know, TLDR stands for too long; didn't read. It's often used when someone finds a piece of writing to be excessively long and they don't have the time or patience to read it all. While TLDR is still used today, it's not as common as it once was. In recent years, there's been a shift towards using other acronyms in its place such as YMMV (your mileage may vary) or IMO (in my opinion).