Except that Mot C1xx phones with 900+1800 MHz bands are no longer available except occasional single units here and there, so I assume that you meant to say that Calypso devices (Calypso in general rather than Mot C1xx specifically) remain the primary hw back-end, and that it is a good idea to tell people about the availability of new Calypso devices that aren't Mot C1xx phones.
Sure, I meant Calypso devices in general. The main idea is that SDR PHY is far from the state at which it could be used by OsmocomBB users nowdays. It's in R&D and testing state.
With best regards, Vadim Yanitskiy.