Counterpoint: On more than one occasion they've mentioned feeling creatively energized by the scoring process and the eagerness to get into new NIN material. They're not ones to rest on laurels so I'll assume that is genuine. And just because nothing's been announced doesn't mean things aren't in motion. I think we'll have substantial new NIN at some point in 2021.
With that said, they've earned a break if they want it. They're not beholden to any contracts that I'm aware of so do what you want. If they've decided to plow forward with NIN...awesome...my ears are ready. If not, that's fine too.