I have multiple keyboards because one just isn't enough when there is so much out there. But really it's more of I want to using something that lines up with my preferences, and since I'm human my preferences change over time. I used to be a vehement clicky hater until I tried alps clickes which are just sublime. It's fun to customize anything to your liking, and that thing happens to be keyboards for me.

The process of finding a really cool keyboard project and planning out a whole build is still fun after the 5 years I've been into mech keyboards. And there is no shortage of cool keyboards projects even if the hobby has slowed down from the COVID boom.