I finished what will hopefully be my last 2->3 transition ever back in 2021. 6 months, ~180 commits, and 3,000-odd files in that single PR, after years of prepa

I finished what will hopefully be my last 2->3 transition ever back in 2021. 6 months, ~180 commits, and 3,000-odd files in that single PR, after years of preparatory work by others. I needed a sabbatical after that.