I got a sample kit as well, eventually, and I’m just a hobbyist.
My bunch of 2350B’s just turned up in my parts library at JLCPCB and they’re available for use, but subject to the above design restriction. I’m kind of miffed about that because when I laid out the designs, the AOTA-B201610S3R3-101-T ( the “special” inductor) wasn’t even named let alone available, so I used the design off one of the commercial boards for vsupply and now I’ll have to rework that. C’est la vie.
So now I’ve just ordered a bunch of the inductors (so that I pass the QA test before assembly) which’ll take another couple of weeks to arrive but still arrive earlier than this restriction will last. They sent me a separate email asking me to be coy about when that will happen (an hour or two after the parts email) so I won’t say when that restriction expires.
Order latency was maybe 2 days for the RP2350B, I bought 30 of them and got a small (~$4) refund over the price I paid a day after ordering, so I think they’re still working out kinks. Still, feels like progress.