Absolutely no!. If you did not get a banner in the SmartThings Classic app prompting you to migrate, you should stick to the ST Classic app for as long as you can.
Many people have noted that Shield and Connect hubs don’t get firmware updates as often (ever?) as the v2. If you’re using any Xiaomi devices they’re noted not to work well with the other hubs as well. I wouldn’t suggest moving in that direction.
I’ll steer away from using the SmartThings feature in the Samsung Connect Pro.
Sounds like a disaster if they dont provide regular FW updates.
Now I just need to decide if its worth keeping the Samsung Connect Pro just for the Wi-Fi mesh setup.
I’ll be $300 CAD in for 3 pucks, not sure if its worth it.