I don't know anything about the Max but the stabilizer trim on previous B737's has always been electric. There are two cut-out switches on the pedestal which cut off the power to the trim motors and there has always been a procedure for a runaway stabilizer. Cut off the power, then use the manual trim wheels. The Max looks the same and I'm wondering why there might be a problem with it.
And there was the recent Texas crash, of course a different model ,767, and a much older airframe, but it also went in at a horrendously high VS. I'm hoping for some black boxes soon, especially if there is some sort of correlation.