GitLab CEO here. I personally don't like this workflow since you lose the history of what you did tested and it someone cherry-pick/referenced or merged code it

GitLab CEO here. I personally don't like this workflow since you lose the history of what you did tested and it someone cherry-pick/referenced or merged code it will give problems. But some organizations prefer this workflow and if everyone is aware that they should not reference code it feature branches it can work. The linear history is certainly nice. The rebase just before merge is a bit of work. In GitLab Enterprise Edition there is an option to do this automatically when pressing the merge button.