Tbh, I can totally understand Nintendo's reluctance to release mobile ports of their classic games, or worse still, go all-mobile - imo it'd be a slow, slippery slope to oblivion for the company. But yeah - their backwards thinking when it comes to online stuff is truly baffling.
For example, I have a 3DS, and I'd be far, far more likely to buy digital games for it if I knew I'd be able to carry my library over to the Switch in the same way that my existing library of iOS games will work on the next iPhone - I'd also be far more inclined to buy a Switch if that were the case. The lack of Playstation/Vita style cross-buy between Wii U and 3DS is unforgivable, and yet Nintendo are probably looking at VC sales figures and thinking 'that didn't work, let's not do that any more'.
The crazy success of the NES Mini shows that there is a huge demand for hassle-free retro gaming, and that people will pay a fair price for old titles presented well, even at a time where emulators and roms are freely available.