I think many people will now wait to see where the new platform changes take us.
Samsung Developer Conference (SDC) 2019 (October 29-30, 2019)
The most recent iteration of the new SmartThings V3 app is much improved for those with fewer than 20 devices or so. (The load time for those with more devices still seems to be a sticking point for many.) The built in rules engine in the V3 app is much better than the one in the classic app. And we are now seeing many more brands added.
My biggest concern With ST remains the “This has worked fine for months and now it doesn’t” issue. Continual undocumented platform changes with no way to protect against them or rollback to the functioning version.
It’s a high price to pay for what is otherwise a very attractive system at this price point.