9, 10 and 11 are following a new release schedule of timed releases (every 6 months), whereas 8 was still a traditional feature release. I would say that aside

9, 10 and 11 are following a new release schedule of timed releases (every 6 months), whereas 8 was still a traditional feature release. I would say that aside of the module system that came with a huge list of now inaccessible internal methods that a lot of dependencies relied on even though they shouldn’t have, there was even more change between 7 and 8 than there was between 8 and 11