I feel like I should be able to, in whichever Git As A Service tool I am using, open a code review on a branch. Not on a pull request, but just in general on a branch. Instead, as I am walking through some 7 year old code trying to get a better picture of what it is doing, I keep tripping over hard to understand snippets. I don't want to get pulled into side quests trying to understand what they are doing. I sure as hell don't want to have to create a ticket asking someone to add code comments. And I don't want to destroy someone else's train of thought asking them for a synchronous response. I just want to leave a comment.
Listener, I am instead creating a text file of file + line numbers and a copy of the snippet that I will then have to manage manually if I ever want answers. It leaves a lot to be desired.