I built my desk out of standard scaffolding and structural ply for the same reasons, if I ever want to change it I can do it with an allen key and an angle grin

I built my desk out of standard scaffolding and structural ply for the same reasons, if I ever want to change it I can do it with an allen key and an angle grinder. No regrets (other than the amount of time the waxing took on the top panel).