I would!
In the early days of NAT RVSM, in a C-5, a 747 passed a 1,000 above. I didn't overly much about it, until about 5 minutes later, the plane rapidly rolled 20 degrees or so and the autopilot tripped off, unable to counter the roll. I had about the mass and 30 feet more wingspan.
I am surprised there are not more upsets of RJs and smaller bizjets in the thirties.
GF