Since the thread was closed before I had a chance to reply!. I was actually waiting to give smarthings the same amount of time to fail that hubitat had. so here are my replies to the posts made after mine.
OK so educate me. Let me know the next steps and let me know where I went wrong and I will retract everything that was said.
Just a note how long did it take you to build up your devices on ST I would be very surprised if you bought everything in one week and installed it all in a few hours. This is what most people forget when moving platforms, that they may have added a few devices at a time so the mesh was grown correctly, then left to settle down for weeks if not months before adding another device (not that you realize that your doing that at the time).
I don't know how big you system is but im guessing its not small, building a stable and strong mesh is of massive importance to any system. It is also almost always the issue with issues like you reported.
Some people have reported that they don't believe that HE radio is as strong as other platforms. Personally i have never had a issue because almost all my devices are powered (a few temp buttons) as i hate the idea of changing batteries. But if this is to be believed and it has nothing to do with the mesh settling down; there are alot of people on this community that say that adding a few repeaters here and there will make your system not only work but be more stable than on any other of their platforms.
I'm also a installer and although I havent sold HE yet, I would never sell ST to my customers. Not after the constant cloud issues I had, where as they are all interested in my story of HE and where its going.
I'm am sure that one day very soon I would be happy to push every man and his dog down the HE route it's just not quite there yet in easy to use UI for the type of people that want to pay someone to set it up.
--- my comment
I have gave smarthings and hubitat the same amount of time . As of today I believe it is 6 days and have installed all my devices the same way. Zigbee plugs first and then bulbs and other sensors (battery powered besides plugs.) I haven't lost one device since the switch to the v3 smarthings hub. I moved all devices with in a day or 2. my problems with hubitat didst occur until a few days after install. I have never had a problem with zigbee devices as long as I brought powered devices up first and have definitely have not had problems days later. My home is not huge a little over 1000 square feet SO even if I installed the devices out of order there is no reason why a centrally located hub would even need repeaters. Unless that hub is under powered.