I'm not in SRE but I'll say what I've seen us do for Compute Engine: every component is testing for roll forward and roll back as part of qualification in stagi

I'm not in SRE but I'll say what I've seen us do for Compute Engine: every component is testing for roll forward and roll back as part of qualification in staging. This makes it more hassle when you write the code (first add your new field, then rely on it only once it definitely won't be rolled back), but we absolutely use our "rollback button" frequently.