Earlier quoted context omitted.
While I absolutely share the philosophical concern, I do wonder how large of an issue this is in practice. On an IOT device, or a retrocomputing/hobbyist platform, you'd likely want to display a QR code and have the user authenticate with their phone, similar to how you log into Netflix on a smart TV. As an aside, to my knowledge OAuth2 still works in PaleMoon. I just downloaded the source and did a count with CLOC,…
It's an issue because browsers keep getting bigger and more bloated, which encourages buying faster machines, which encourages consumption, the related production, and all the waste and pollution that come with it.
Although since we're here, discussing numbers of lines code—how much do you think web browsing performance has to do with browser complexity versus the websites themselves? I've always assumed the primary issue was the latter. Does e.g. Hacker News have higher system requirements in Chrome 97 vs Chrome 1.0?
Browser complexity worries me for other reasons—namely, the web isn't really a standard if there's only one implementation that matters, and because browsers are so complex, no one can really hope to create a new one.