Hey, remember that time the entire power grid in Texas was crippled due to things going out of temperature range spec? Only in that case, it wasn't a beta product, it was critical infrastructure, that they were warned about and had ample opportunity to fix.

Getting components rated outside of "normal operating conditions" is a PITA on a good day, and impossible otherwise. You straight up don't design for every possible condition for the beta. That's bad engineering and a waste of time and money. Pick the number of 9's you want, estimate the conditions, draw a line in the sand, and build the damn thing, knowing damn well X% of customers will have an issue. Revise, fix it, refine your product and process.