It's every developers dream to force designers to use GIT like versioning, but this just isn't the solution. I think Figma is the closest to how designers really work and could just expand their current system a bit and it'll work much better, without any additional tools needed. We tried Plant, Abstract and Kactus and none of them solved stuff as we would like too. Plant was the best approach but buggy as hell, didn't commit etc... Just my two cents...