I’ll try to make this brief…
It appears I now have Zwift working with no crashes!
I was using Intel’s driver updates, but Intel told me to use my laptop manufacturer’s updates (Dell).
In this thread, or maybe another, someone said to install x driver from March 2020. I didn’t have the same option, but I installed the Dell driver from March 2020, and this seems to have fixed the Zwift crashing issues.
Intel and Zwift don’t seem to care, and Dell discourage using out of date driver updates, but what I did works for Zwift.
I’ve done about 18 hours or more, across about 14 rides and everything has worked well.