I put a lot of hours into SupCom. It was always a buggy mess, but I do remember it quite fondly. Planetary Annihilation has felt like the right progression in the spiritual series. It was always a very smooth experience and fixed the technical issues with scaling up to massive scale combat while fixing the balance issues of turtling. The skill ceiling is immense and I could never beat high level bots. The nature of having one to many planets also means you can play cooperatively with up to several friends. It's a good time.