The C7 has definitely been a stable hub for me. I have 3 of them left. Sold one with my house.
There’s a myriad of ways to do things and some of them are just wrong, some are wrong for a certain person, or wrong for a certain environment.
If you want to play with Home Assistant, why don’t you? This project will give you the flexibility of the HA device support, combined with the ease of HE automations.