I love the fact that people outside the Python ecosystem are spreading the word about sans-IO. I think it should be the next iteration in coding using futures-based concurrency. I only wish it were more popular in the Python land as well.
I think the solution resides somewhere in the middle: make video streaming platforms more like music streaming platforms.
Nowadays, YouTube Music, Spotify, Apple Music, Tidal, ..., all have roughly the same base music collection, competing on gimmicks like live lyrics or, for example, YouTube Music with normal video playback, or Spotify with its podcast library and sharing abilities.
This way, there is no centralization around a specific entity, but you also get to have the entire library of things worth considering to the average consumer.
I don't really know what to say about Disqus, it always felt like something in the design of its interface was a bit off-putting. For me, Privacy Badger always blocks the embed and I think people from privacy-conscious circles would definitely avoid loading it.
I (somewhat) recently saw a post[1] from an author I like that sent me down the rabbit hole and it seems like Disqus also tends to inject ad scripts into the websites that host it (which, honestly, makes some business sense because they are a for-profit and not a lot of people are using their non-free plans).
In that same article, it was also mentioned in an edit that Giscus[2] seems like a viable solution. In my eyes, it really looks like it's the best client-side comment library out there and when I start my blog I'll try to use it for comments.