For the Zoom TKL I know it isn’t compatible with standard h87 pcbs as the USB port is in the center of the board. The h87nu might work but I’m not sure if it would physically conform to the case dimensions. Plus you would need the daughter-board for the 87nu which also might not have a spot in the case. Best case would be to ask in their discord and see if someone knows or can do a test fit.
Or just wait for round 2 of the Zoom TKL, Wuque usually comes out with more PCBs on product updates like with the ikki68.
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.