[reaperhulk]

Very few people were demanding Python 3 support 10 years ago. Prior to 3.4 uptake was limited so we’re really talking about 4 years.

Also, old appengine was built with nacl (remember that?) sandboxing. Anything that couldn’t be built under the nacl sandbox couldn’t run in app engine. Google realized this was a problem long ago but it takes time to rebuild your whole platform to eliminate such a fundamental dependency. That may have taken most of their focus, leaving little for other projects. and of course their new arch makes python 3 free so it’s difficult to have a parallel engineering effort that will be rapidly deprecated.