> if adopting a standard is actually a negative for websites, because it will separate the site from its users, sites will obviously not do it.

Not that I believe this will be how the future turns out, but what if the main users of websites end up being agents? Then adopting the standard ends up being a requirement for survival instead of something negative.

Hopefully and ideally we don't end up there, because then the internet will surely suck for us humans, but I'm not so sure the whole "make platforms/websites open up for the machines" will necessarily fail yet again because of the same issues, can very well be different this time.