I've mentioned this before in the drop discussion. There seems to be an earie issue. All the rampant ideas of whether this thing will come back in its current form/price due to the demand.
One post would be all it takes from THX or Massdrop to silence peoples skepticism, but for whatever reason, it's been pure radio silence.
Based on demand I doubt most people would get theirs even if a drop opened tomorrow. They simply didn't forsee the demand (especially have objective testers proved that this amp - for the money - blows everything to pieces essentially). So even if they open up a drop (maybe) in June (after the May drop), it's doubtful that you or most would get it. You can bet there will be bots trying to snipe this thing.
My basic guess, is this thing MAYBE will come back for one more drop. After that, they'll be probably looking to use this board (or a variation) in a new - far more pricier product.
Personally, if it ticks all your boxes. Bite a bullet, and buy over MSRP second-hand (if you can find someone selling one that isn't fried or something), and call it a day. You'll seemingly pay perhaps $100 over MSRP.
Me? I'm looking to get an RME ADI 2 DAC, and if a 789 ever releases again (or I can source one brand-new) then I'll pair it up with that, and be fully done with this upgrade ordeal once and for all.