I think that the usefulness of tritium sights is undeniable if you do low light or no light shooting, and even for the dreaded "Home Defense" topic. But manufacturing Tritium sights is labor intensive between imports, testing, QC, assembly, etc. NEA has been streamlining their accessory product line for the last 8 months or so. It's likely that a lot of their old products will not come back.
If someone else makes one, I'd be all over it. I've contemplated filling my front sight post hole and retapping it 8X36 for an AR sight post.