Right, but the real question to ask is whether we really have to put up with this update treadmill in the browser landscape when the web is now approaching 30 y

Right, but the real question to ask is whether we really have to put up with this update treadmill in the browser landscape when the web is now approaching 30 years of being in existence. After all, HTML was supposed to be a vendor-neutral document format with links and to work like, say, MP3 where a player/decoder can be used with any new material, rather than a be-all/end-all technology where browser updates seem more frequent than content updates.