I bought 1.4Ghz 4GB 500GB hdd version.Big sure is better than Catalina, but it’s not fast for heavy work like simulator and so on. You can still do web browsing and listen music at the same time with a little patient.But.IF YOU CAN INSTALL NVME SSd IN THIS, nvme Ssd changes everything.Boot takes 30-40secsiOS simulator takes 15-30secsMultitasking works well and transitions between apps are fast. 4GB could be not enough for multitasking but fast nvme Ssd swap memory could cover memory shortage very well.I installed western digital sn750 500GB with ssd adapter made by sintech in Mac mini 2014, and Blackmagic speed test shows 680MB/s for write and 740MB/s for read.4 or 5 safari tabs, Flutter, vscode and simulator at the same time works well.I think if you are first at Mac and don’t want to spend much money, I recommend this.Mac mini is a computer not a notebook, so it’s not easy to be out of order, if it is then it’s easy to fix than notebook usually.New Mac OS Monterey can be installed on Mac mini 2014 and it could get update until 2024 I think.Ps. T6h precision driver is needed for installing nvme inside Mac mini 2014. Western digital nvme Sn750 is cheap($55) and has good average speed until full(1000MB/s).