Redis is no longer free software

We did not have "an open and interoperable web" before EME, we had Silverlight that didn't work on Linux, and Flash that sometimes worked after endless tinkering completely out of reach of non-tech-savvy users.
Thanks to the EME standard interface, and thanks to corporations that maintain builds of the implementation that work, things that people actually want to use nowadays "just work" on Linux too. We are so much better off now than we were before, and it's not even close.

Would it be even better without DRM? Of course, but a strongly worded blog post from a height of 0.0x% of market share is not going to make that happen, because we live in a capitalist society and that's just not how capitalism works.

Pick your battles.