What are advantages of it and also how said mailing list works? (In case of software development)
Git was specifically CREATED to facilitate this exact mailing list workflow.
With git you don’t have to push and pull to a repo, it also works by sending signed commits over any method you want.
Linux development includes a large number of contributors who use email. Git was originally created specifically for Linux development so of course it caters to this approach.
There’s also the fact that the lead devs for Linux serve as a clearing-house for patches, so receiving them over email with explanations and everything helps them decide what makes it in.
Pull requests are not the only way of doing things. Generally speaking git can do a lot of workflows and architectures but most people are only familiar with gitflow and PRs.
Probably because it works and there hasn’t been a strong reason to change it.
It would work better under these modern methods, but the fallout during changing would be too much to handle
define better
It’s obvious in the case of git, git development occurred before gitlab existed.