I think it would've been a better choice to move to something they host like gitea or gitlab. nonetheless it's a step in the right direction, nobody should use mail+git in this day and age.
Ayup. Which is why it is heartbreaking to see Nginx move from Mercurial which is good to Git which sucks.
Thankfully, jujutsu exists so I can use a good version control system and still interoperate with the misguided who don't realize just how bad Git sucks.