This is genuinely impressive work. I love that the halves stay tethered, nothing loose to forget in a laptop bag, and the fold-out layout still reads like a normal keyboard when it's open. Also a smart pick on the KS-33 low profile silents; a clacky build in an open office is a fast way to make enemies.
How are the hinges holding up after some days of commuting? That would be the part I'd be most nervous about wearing out over time.
Good to see a release focused on polish rather than new flashy features. The new Sub-GHz protocols are a solid win, more coverage without bloating anything else. The NFC fixes catch my eye too, since that's the part I use most on mine.
I'll probably wait a few days to see what shakes out in the issue tracker before flashing, but this looks like a very safe update. Appreciate how steadily these keep coming.