spacemacs is great but doom is night and day faster. I use doom for just magit now and the startup time is almost negligible and the other affordances are still there if you want them.

spacemacs has a maintainer problem and some serious debt that needs to be paid before it is a worthy contender in my opinion. the whole you need to run on dev branch and it's many (thousands?) of commits ahead of the main branch and having many many stale/outdated/broken issues is not tenable.