> older sites should fix their sites.
A lot of the reason they are considered “older sites” in the first place is because they are not heavily maintained. The thing to remember about the web is this: not all websites are “software” that is maintained. Some of them are static works similar to a movie, with static content.
> The single-byte Latin scripts are semi legible, so that is enough for me.
Did you see the example that I gave of Polish text? I am sorry, but if you feel like reading multiple paragraphs this way is bearable, then we will just be stuck in disagreement.