Been playing theatre gigs since last summer using a 500w Markbass LM2 and two Markbass 2x10 cabs. It’s all very lightweight and modular, never been short on volume onstage, and easy to transport.
Gigs that size will have a big FOH system and decent monitors or IEMs anyway, and for smaller gigs I can get by with a one of the cabs.
Im also from the era of “big is best” cabs, but having lugged around 8x10s, 4x10s and various combinations thereof over the last 30 or so years I just don’t want to do it anymore.