Looking forward to getting the Switch because I always liked Nintendo's handhelds and this qualifies. Just hope they work out the design/quality issues by the time stock catches up to demand.
A friend of mine built a pi based emulator, I played around with it the other day -- it was actually very nice. The controllers he used in the setup were bluetooth (8bit brand?).
It is also difficult to tell what the cap on demand is. If they think they satisfied maybe 70% of the total demand for that product with the N-Number of units they produced, they may consider that "good enough" and not worth launching another production run.