Also, for the Python ecosystem closed source projects are less relevant than the open parts of the ecosystem. And the open side has rather clearly decided which

Also, for the Python ecosystem closed source projects are less relevant than the open parts of the ecosystem. And the open side has rather clearly decided which versions will go forward. On a data level: I wouldn't be surprised if most of theese projects are either not actually new (ie. only added to their CI system, codebase is older) or is related/interacts/integrated to/into a Python 2 codebase, which arguably isn't a from-scratch project, either.