Any competent senior engineer has done a major refactor or manual rebase-prune merge so it’s not like its a rare event. You just have to have discipline and be

Any competent senior engineer has done a major refactor or manual rebase-prune merge so it’s not like its a rare event. You just have to have discipline and be prepared to to do the plumbing correctly so that you think ahead of the future dependencies etc… its just doing real engineering