Yea, I was guessing you were talking about old simple, one task scripts. I did have to port some Python2 to 3 on a few projects. Some of it wasn't that bad, but there were some things that took a while.

I commend the efforts of the BeautifulSoup4 devs who had to deal with the entire SGML parser being removed.

The 90% number was hyperbolic. It does spit out what it can't auto fix, and I just hoped the process had gotten better now that most libraries/frameworks have been ported over. I haven't had to do any py2->3 porting in years either. 😋