Can you provide a single example that supports your thesis that migration from Python 2 to 3 was poorly managed semver-wise? If anything, Python is chastised f

Can you provide a single example that supports your thesis that migration from Python 2 to 3 was poorly managed semver-wise? If anything, Python is chastised for having maintained two major versions in parallel without giving any compelling reason to force major rewrites on the while ecosystem.