> removed a while ago and them seemingly not being interested in supporting it
Removed because no one from Google benifits from supporting it then.
Re-added because someone could get a promotion by supporting it now.
Removed because having yet another giant C codec was a huge risk, re-added because the PDF Association chose JXL as their next image format so anyone rendering PDFs (including browsers) is now required to have it.
> nobody benifits from supporting it
Do you mean the users of the browsers not benefitting, or specific Google employees/stakeholders?