[chrismorgan]

If these things are a good idea, they should be applied generally. Depending on individual sites to apply them, and individually at that, means that most sites will never get them, and that the “best practice” has an ever-increasing weight and burden over time.

[chilmers]

The problem is, changes to the web platform need to be backward compatible. You can't make a global change without potentially breaking existing content. In this case, you could easily end up triggering scrolling in a bunch of places, or with punctuation being invisible or looking bad. So it has to be opt-in.

[chrismorgan]

Refer to my response to jahewson. You can easily apply this to the vast majority of content with negligible hazard.