This sort of glosses over the main point, which is that Amiga Inc., later Cloanto, repeatedly took Hyperion to court in an attempt to stop them from developing and selling updated Amiga software (and I believe hardware too, in some cases). I think this has been happening in some form or another for 20 years.
We live in a world where Apple—Apple!—released the source code for Apple Lisa OS, yet Amiga Kickstart ROMs are closed-source and cost money to download.
I'm sure Cloanto has done good work, but in any other retro community, this stuff would be open-source community projects.
Likewise, Hyperion could probably open-source AmigaOS 3.2, etc. without putting a dent in their revenue if they chose the correct open-source license. I don't know if they would, but the fact is that they can't even try, because they only have the right to release AmigaOS updates (which they also had to fight in court for years), and not to distribute source code.
I haven't been around for as long as many Amiga enthusiasts, so let me know if I got any details wrong here.
edit: See Gorilla1000kg's replies for some good information as well. I've met Mike, and he seems like a good guy and truly cares about Amiga. I don't know much about Hyperion, but they clearly do amazing work on AmigaOS. It just sucks that these beloved classic platforms are so intertwined with business interests.
For what it's worth, I haven't really seen any infighting about this in the Amiga community. We get excited when we hear about new releases. When there is news about some lawsuit over Amiga assets, the sentiment is just "We're tired of this bullshit".