I live in a 1 bedroom 1 restroom apt which can’t be far-fetched from my hub by any definition, I have less than 100 sensors in total, including WiFi ones and simulated ones.
I consider myself with adequate knowledge in home automation systems.
I do have sensors such as Xiaomi’s that are not officially supported by Smartthings, but my Cree bulbs are also dropping.
I did noticed every time a drop out is happening the Smartthings platform is experiencing upgrades or patches.
At this point I would strongly suggest people stay away from Smartthings as I actively seek alternative home automation solutions.