It was somewhere outside Barstow when wrote:

Not heard of it, but asbestos risk depends on the type of abestos used:
white is not a significant problem, but blue and brown are serious
risks.

White asbestos is a significant dust hazard if you're cutting it, it's
just not on the same scare-level as "asbestos". Even MDF or mahogany
is a "significant problem" for dust control.