If they every have a badly selling console like the Wii u again expect them to ramp up emulators to look generous and add a lot of value quickly.

The nesticle emulator blew my mind as a kid.

Sounds similar to Donkey Kong 64 (1999) that had an arcade machine inside a level that let you play the original Donkey Kong (1981): https://www.youtube.com/watch?v=vwPRHdhhVK8

> Nintendo doesn't simply have its entire catalogue available via virtual console

Not entirely the same, but Nintendo does offer a lot of their classic games through the Nintendo Switch Online membership: https://www.nintendo.com/us/online/nintendo-switch-online/cl...

Ex. We'll probably never see the first six FF games on Switch Online, Square Enix is just unlikely to agree to that for a variety of reasons.

And there's the reason Nintendo isn't doing it. The top priority for them by a massive margin is consistency. The QA they perform for their own products would require an absolutely enormous amount of staff, all for a minuscule payout because there just is not the kind of demand for those games that would justify such a return.

It was probably only semi-deliberate, though. Even more than for hobbyist emulators, the point of these was to play games - and in these cases, some specific games too. And for most games, most of these inaccuracies are going to be pretty imperceptible in practice.

So if I were the poor Japanese salaryman entrusted with making this emulator, I'd start by implementing the NES hardware in the simplest, most obvious fashion, and only go further where necessary to get these particular games running. It just so happens that, in emulation, more often than not "simplest and most obvious" also usually translates into fastest.