Cox _just_ sent out a similarly-phrased email (Subject: Enjoy this gift of faster internet, <me>) saying they bumped my upload speed from 35->100mbps. I didn't expect that given the new minimum upload speed is 20mbps
From the end-user perspective: I see Yuzu and Ryujinx differences as mostly about game compatibility (I keep both around). I personally don't know any feature one has over the other that might drive people to a specific one.
As far as the requirement to own a Switch, it mostly has to do with being able to decrypt games to play them and system OS apps for services they provide to games. If they were to ship these keys or firmware blobs, they'd be at risk of litigation from Nintendo versus providing documentation on how to obtain the keys and firmware legally. Some of the firmware files might be able to be reimplemented in the future depending on patents and the like.
As a side note, the files required to play _can_ be found online, probably by searching the firmware version plus the filename from Yuzu/Ryujinx docs. (The keys are firmware version specific, and I think tools like RyuSAK let you get both keys and firmware, but this definitely isn't the legal way to go about it )