Wait, this sounds like redesign for redesign's sake?
> Coming soon: MDN Plus [..] In the coming months, we’ll be expanding MDN to include a premium subscription service based on the feedback we received from web developers > Support MDN and make it your own. For just $5 a month.
Ah, this makes sense now. It looks like MDN is trying to rebrand and reposition itself as a subscription service going forward.
I remain optimistic, it's been a great resource over the years.