Moreover, Star Fox was kind of... programmed by teenagers. Miyamoto is credited as both the producer and designer, but both Cuthbert and Goddard were 18 or 19, and Wombell (artist and designer) was maybe in his mid-20s.

Star Fox's development is an incredibly wild story where British teenagers argued what the SNES could do with bespoke hardware, and they ended up being shipped out to produce it because Nintendo felt they couldn't ever do it themselves. It all started with Argonaut's demo of what would eventually be released in Japan as "X". Entirely software-based 3D, on the original Game Boy.

There's actually a very humble quote by Miyamoto where he learned that someone can't just get better as a function of age and experience, after he clearly realized that these teenagers could produce something no one else in Nintendo ever had a hope of. Perhaps it's why the franchise has done so little -- Nintendo's just not in a remotely similar headspace the Argonaut lads were.

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Fun videos on the subject:

"The Teenagers Who Taught Nintendo How to Make Star Fox" - People Make Games, https://www.youtube.com/watch?v=to4Ekb0kXiE

"The Making of Star Fox" - Strafefox, https://www.youtube.com/watch?v=GDhNT2Qv-Mo

The previously unreleased Starfox 2 is not a retelling, it is a proper story sequel. That is the one game where you're wrong, every single other game is a remake, with Starfox Zero the most tenuous one, but still a reimagining. They've remade the same story five times.

Nope. There are no new levels on 3DS.

That makes sense to me, and fits in better than SNES > 64 starfox, which is more of a spiritual remake than an explicit one.