The #Indieweb philosophy of do over say is also a more sustainable approach. So much #edtech innovation is vaporware promises of tools of tomorrow, semantics that never settle. All the tools used in #IndieWeb community exist today, not tomorrow
This makes #indieweb stuff accessible to all, but not as much as a commitment to HTML. You want the most accessible approach to #OER that reaches all learners, works with screen readers, is easier for localisation you use HTML. Full stop.