[dragontamer]

Fair enough. 0.4mm pitch is definitely looking difficult from a physical assembly perspective.

I guess I thought you were talking about the difficulty of the PCB design, not necessarily the physical tweezers + soldering iron needed to assemble this.

[jacquesm]

Between failing eyesight (+3.5 now) and unsteady hands this stuff is way out of my league right now and I don't think I have to hope for a reversal on either. Maybe I could train one of my kids ;) Of course I could design a board and order that but that sort of negates the whole advantage. I liked the SODIMM edge connector format much better (and at 0.6 mm pitch it too is probably outside of my comfort zone, but not nearly as far and with some tricks I can probably do that).

The real reason I think I'm a bit disappointed is that Raspberry Pi stuff tends to the end of the hobbyist market where a low barrier to entry is what gets people into the devices and this one breaks that pattern it is simply an industrial intermediary product, not something aimed at end users.