For me, it was laziness. While I have the skills to built one from parts, I just wanted a big drive in an aesthetically pleasing box. I didn't want a project. I wanted something small and somewhat rugged. So I got a synology 5-bay almost seven years ago and have never looked back. It lives beside my UPS and wifi router in a small tower, all objects I expect to "just work" for months on end without any attention.

My AI rig ... that is a project. (After a kernel update, one of my GPUs has disappeared. Fixing that will be a project for my next day off.) I don't want my NAS to ever become a weekend project.