Just because you may not do the old content, doesnt mean others dont. Or that new players coming in dont do it...
I for one consistently go back and replay old content (with the exception of PvP but only because I dont PvP)

But really, its already content they've created. There's nothing holding the dev team back in this regard. What is holding them back is COVID. So I guess if we want dev time to go back to normal we'd be better served by doing our part to slow its spread while we wait for better treatments.