Here in central Maine, things seem to be stable, perhaps a little growth. In our town, we've had APA 8-ball for many years, and we always have between 11 and 14 teams, depending on the session. We're currently into our second year of APA 9-ball, after several years without it. Not as much participation, just 6 teams, but holding steady.
USAPL has just started here, as well, and hopefully there will be enough participation for that format to survive and grow.
Two other towns nearby have good APA leagues, both 8 and 9. Actually, they do better with 9 than with 8, and far better than our 9-ball division, despite us being a much larger population than those towns. So league is good there, as well. Both of those towns take turns hosting the tri cups and best of the best tournaments, too.