Nope, tried twice, same result, upgrading stucked at some point, never finish, force rebooted the phone and bootloop happened, had to restore from backup, this is why backup before upgading is very important, don't know what might happens, this is the 1st time I've ever had problem upgrading dev ROM in the last 1,5 years on Redmi Note 3 and Mi Max 2.
I guess you can try to upgrade, just MAKE SURE you backup at least the System and Data partition in case of problem, there was one guy who said Mi Max 2 all works, so obviously not everyone face the same problem, or you could just skip this weekly, unless there is something you need from this weekly update, 8.3.8 is a good one for me.
Edit: Think I'll try upgade again, but this time without Magisk installed and will try to figure it out at which line the updating process get stucked, who know
@ingbrzy can help us.