I'm with you but when a feature branch is merged everyone at the time got the benefit of the git history of the changes in a nice logical way. The PR is approve

I'm with you but when a feature branch is merged everyone at the time got the benefit of the git history of the changes in a nice logical way. The PR is approved and it's merged in but now the feature branch is deleted and the individual rational list of changes is lost when that feature branch is rebased on main. I guess it's a lot of extra storage but if those branches were kept it would help illuminate the individual steps that benefited the reviewers at the time but now take additional archeology.