I live in MN.
We have 5 major pool rooms. Each has at least one 9', but the majority are 7' in all. A couple have just one 9'. Furthermore, none of the 9's are tournament Diamonds. All are older and a bit gaffy, none play like new equipment. Some are triple shimmed for one pocket, some are quirky in other ways. I predict in 10 years I might not be able to find more than 1-2 rooms with a 9' at all, and that will be like how some rooms today have a snooker table. An oddity for the last generation.
We also haven't had a big table tournament in MN for years. It's all bar table. Mostly handicapped or Fargo Rate capped. But even the few open tournaments are bar table.
As a result of this I've played one tournament a year in my home state. The majority of my play is in other states. I practice at home on my 9' Diamond, I train, I spar with other players at my place, and I travel to play pool.
Change is change. Pool room owners have to do what they have to do. I'm fine. But I do feel a bit sad for the 12 year old I know that is running nine ball tables on his 8' at home dreaming of greatness that will have to find his way to the elite level among a sea of bar boxes. I'm coaching him so I'll try to steer him right. But it doesn't make it easy...