A couple of things 43s related

[Thomas Radtke]

I find the Pi quite limited as there's no onboard flash memory. You'd have to provide a (µ)SD-card, which might be a problem mechanically (the Pi2 has a much better card-slot, however). Time for boot-strapping, general latency and the need for a shutdown before switching it off might be another problems with Linux, so it has to be programmed on bare metal or something like RISC OS. It is a great desktop system with all the support it gets from the foundation and its users, but that's about it imo.