This last month has been interesting for outages. It’s the most I have seen in a little over a year.
I’m expecting to see more because they have ramped things up and have a whole lot going on side by side. There are several betas going (Account Migration round 2, IOS Mobile Presence, 20.14 Firmware beta, and more) and they are planning to merge everything into the Samsung Connect App which is supposed to be a huge deal over the SmartThings app. So with all of this being deployed and tested at various points, my expectation is that we will have more outages in the near future before it gets better. Which I’m prepared for and don’t have my house setup to be dependent on SmartThings alone. No sirens tied to SHM.
If you have devices that run locally that’s your best bet for those to remain functioning when the ST cloud rains. Smart Lighting is the only SmartApp that will run Automations locally and all devices contained within must be local as well. And only a portion of SHM is local so if you have things dependent on that, you can be SOL. It’s all about planning and preparing.