Sadly, I've found even supposedly skilled electricians who are afraid to use MWBC's. :roll:
Back when I was wiring new houses in 1999/00 before the dawn of the AFCI, we would run tons of 3-wire circuits throughout the house. Those were the days.
You can still run mwbc's today. Most panel manufacturers have two pole AFCI circuit breakers. Do you save any money anymore running mwbc's? Probably not.