[lnanek2]

Matz is the creator of Ruby. If this guy really wanted to play ball, why didn't he just submit PRs for improving the real Ruby's test suite? Instead he just made his own thing, well duh it didn't end up a part of the real Ruby. OK, a hosting provider wanted their own Ruby implementation to fix concurrency issues, but that doesn't suddenly make the creator of the language have to do things their way. If you fork or reimplement a project and do whatever you want, well you took control so you gained something, but the creator has no obligation to change to your fork/reimplementation.

[krschultz]

That glosses over all of the arguments the OP made about making a test suite that can work with all implementations of Ruby.