Mike Berger wrote:
You might need to use drywall for fire resistance. It's not
a great idea to have shop walls that are flammable.
....

That's being paranoid to a fault. In a frame building, the wall surface
itself is pretty immaterial.

If one is really concerned w/ a fire hazard in a shop, the most
important areas are a fire-resistant storage area for flammables and
passive sprinkler systems plus detection systems ideally connected to
local responder.

--