Ah, I didn’t notice the nosd part in the name, I will later test if the BLE stack works as intended otherwise… it would suck. It seems bigger than the previous so I doubt the SD is missing completely (maybe disabled).
As for the Wiki: yeah, the information is scattered a bit everywhere. In this forum there’s a post explaining how to use a raspberry-Pi to re-flash the bootloader when it stops working and it can’t accept uf2 files anymore. I think JLink is a reference to the protocol name, so any SWD programmer which supports it should work.
So far I am pleased with what I’ve seen but I might change my mind if BLE doesn’t work with this bootloader.