Efi spec states it must be safe to delete all variables. It’s only motherboards not adhering to the spec that are affected, effectively faulty hardware.
If you do this on a mb from that era chances are nothing will happen, and if something does happen chances are it is recoverable. You’d have to have some truly bad luck on your choice of mb to have it be permanently bricked by that.











Wine can actually beat native in latency, since it’s a pretty thin translation layer and windows is … windows.
I’d give it a shot just in case.