I don't think this should be forgotten about, so I'm adding it to https://updates.orgmode.org/#help for now.
- Re: W3C violations in Org's HTML export TEC
- Re: W3C violations in Org's HTML export Bastien
- Re: W3C violations in Org's HTML export Bastien
- Re: W3C violations in Org's HTML export Bruce D'Arcus