You seem to trying to express a negative response to the fact that these companies create design frameworks. I'm interested as to why you feel this way?
I didn't read it that way at all, it's simply highlighting that there's a large number of options to chose from! It's great that more companies are publishing their design frameworks, although part of the reason for doing this is certainly to attract talent.
Having partially reviewed a couple of these, I'd say quality varies quite a bit so be sure to dig through the code to see if you'd be comfortable helping maintain that. Always be sure to review the license! For example, Microsoft Fabric is MIT, but the assets (fonts and icons) are under a separate license.
In a way yes, it was about the utility and relevance of Yet Another Corporate Design System. I couldn't find what I really wanted to post, which was a list of all the abandoned Corporate Design Systems - I think I must have seen that in another comment.
Having partially reviewed a couple of these, I'd say quality varies quite a bit so be sure to dig through the code to see if you'd be comfortable helping maintain that. Always be sure to review the license! For example, Microsoft Fabric is MIT, but the assets (fonts and icons) are under a separate license.