The article asks about includes but also about imports ("HTML cannot import HTML ") which this is very directly.
This feature was billed as #includes for the web [1]. No, it acts nothing like an #include. TBH I don't see why ES modules are a "replacement" here.
Personally I would like to see something like these imports come back, as a way to reuse HTML structure across pages, BUT purely declaratively (no JS needed).
#includes where partially formed HTML (ie, header.html has a <body> open tag and footer.html has the closing tag) isn't very DOM compatible.
