Also, may I suggest - get a couple of spare switches....

Funny you should mention this. I had thought seriously
about this myself, and may do it, BUT...
Each switch or dimmer or controller is roughly $100 ea.

You have to weigh having $300 in unused spares vs the
odds of getting into a thorny problem down the road. My
guess is that there will be something around. Maybe
have to replace all units together, but something that
will be able to use the current wiring.