I would not say they are good or bad. They just are.
I work for the largest pod group in my state, which has a few offices in other states... I was also offered a job for FASMA at a couple of their NC locations before I took this one.
The (base) pay is higher than small PP.
The partnership or owner opportunity is non-existent.
There is no worry on the marketing or staffing or reimbursement things that can be a headache if you're a small PP owner.
The staffing might suck, depending on your management.
You can have fair autonomy depending on how you set it up.
There is the annoying undertone to push nail samplings, OTC stuff, etc to bonus.
There are a lot of docs in the group to share coverage and mastermind with on coding, etc.
There is always the change that you'll be replaced with someone cheaper (just like hospital FTE jobs) if you don't play their game.
A few of the supergroups have failed in epic fashion. I'm sitting in an office right now that is was used for a bit by a supergroup from Colorado that bankrupted themselves.... owner was smart enough, DMC trained. It is not impossible to fail when you are borrowing at high VC interest rates to expand quickly, though.
A couple of my buddies and my residency attendings run the big/huge groups. Their doc retention is high, higher than small/medium PPs for sure... near 100% retention for the multi-state big group my residency attendings run. So yeah, some of them run pretty darn smooth.
For better or worse, the big groups are here to stay.
Podiatry always laments the lack of hospital/MSG jobs, so these big groups are essentially to DPMs what Concentra is to ER docs and NPs? As to why "some practice owners I thought would NEVER sell" do sell... welp, everything is for sale at the right price.