Planetary Annihilation was made by some of the people who worked on Total Annihilation:
https://store.steampowered.com/app/386070/Planetary_Annihila...
https://en.wikipedia.org/wiki/Planetary_Annihilation
More than just a spiritual successor, imo.
That game always felt more like supreme commander then TA to me... Personally I preferred the foss games spawned out of the spring engine like eg zero-k and the previously mentioned beyond all reason over it
Yerp, sadly spherical maps just didn't work. Imho, obv, but I really did try and persevere with it, believing in it at the time.
Unfortunately did not even come close to capturing the magic of the original or TASpring / BAR though, sadly. I wanted to like it but it suffered from a lot of sequelitis.