It's a fairly robust and well known/documented set of ways of interacting with the world of computers, one known to many outside of the few that would want to bother with a boring device like the switch (What has the switch really got? A better than most, for now anyway, computing power* and some middle of the road buttons by default. Whoo). It has various lists of software already made for it ranging from emulators to web browsers to file/media servers to media players to coding languages to all sorts of little applications that do things few homebrew coders are likely to care to port over, if it is the android flavour of Linux then it is fairly well monetised for those devs that want it (a lot do, see the end of the PSP and DS scenes).
*though likely not enough to push it to a higher level over more common devices. Your bog standard Scene videos will decode just fine on simpler devices (the 10 bit anime bellends can continue to hallucinate better end user quality elsewhere), emulator wise it is probably going to be "16 bit and older is just fine, something but still tricky on newer stuff" which is just like the PSP really, and it is not like it is enough power to go toe to toe with all the other system grinders of 3d modelling, serious video editing and CAD.
For the likes of the DS it represented the above but also a way for people to have a very small but network enabled device in their pocket. This was surprisingly hard to do at the time and thus we actually saw people use them in the real world for stuff like SSHing into servers when on sites. Today we already have phones and tablets with existing stuff so it is not such a draw, but if you can have it then absolutely do take/make it -- some seem to take the position that having another device renders such things pointless, I would argue it renders it essential if you want to compete.
Indeed I would hold that the Switch is unlikely to see a full bore homebrew scene like we saw on the GBA, DS, xbox, wii and PSP, case in point see the general meh that was the 3ds homebrew scene. To that end it has to be simple for those that know, has to have a low barrier to entry for those that don't and generally make things a bit easier. If someone has to learn say libnx (I assume libswitch has been taken already) and then implement a proper network handler then they are not going to find some cool new website with a nice API, put a basic wrapper around it and share it with the world (you know, like all those fun things on the DS that allowed you to have maps on your DS in mid 2007
https://gbatemp.net/threads/treasures-of-gaia-v0-2-released.58659/ ).
