Very few of Cherry's own boards have plates - they have PCB-mounted switches, but almost all other keyboards with Cherry MX switches have plates.
It will take a bit of time to desolder all switches from a board, though.
but there are loads of vintage boards with cherry switches and plates. Wyse for example. So the question is indeed valid.
When the OP says "cherry board" I think he means "board with cherry MX switches" not "board with cherry logo on PCB/case"
Desoldering isn't too hard, depending on a number of factors, but drilling a precise hole in that steel plate might be an issue, unless you have the proper tools. Some cases this won't work with and you'll need to precisely cut the outside of the plate which is even worse. Depending on your PCB, you might also have to drill or widen holes in the plate for stabilizers.
And I can't believe I forgot the biggest issue: most vintage keyboards with plates have layouts incompatible with modern PCBs and cases.