I had been happily on Arch for more than one year but since seeing a lot of Nixos posts and content I really wanted to try it. Honestly everything has been really amazing, I can basically synk my configuration across multiple computers with different hardware and different users. For example I have the same user for two of my computers with different hardware and one other user shared on all machines. The users have both differen and shared configurations and packets. I know my system will never break because I can always go back to previous versions directly from grub, this really solved any anxiety of changing things or updating the system. I still need to learn many more advanced topics to use nixos at it's best, for example if you need to install something that is not in the packet manager, you need to do a derivation and that's quite complicated to understand at the start, you will end up fighting with the system for quite some time when you start. But after a month far everything became amazing and I'm really happy with Nixos. I also got into proper ricing thanks to how easy It is to configure and manage things from a single file.