... and you can't translate a page, you can't search on a page, you can't select...

... and you can't translate a page, you can't search on a page, you can't select or zoom images, you can't open link in the new tab.

Imho, making custom "DOM" via canvas just to make UI look fancy is not a solution. Web was always about delivering accessible content for everyone.

Though, library might be good for web apps or games that are not content oriented.