Here's my take on this debate.
TASVideos, first and foremost, is a repository of tool-assisted speedruns. We have The Vault™ for any% and 100% runs that are speed records, but not particularly entertaining; we have the Moon Tier™ for most everything else, including esoteric goals; and we have the Star Tier™ for the elite of the elite.
As far as Super Metroid getting preferential treatment in terms of categories allowed, I do agree that it has happened. I never minded, but I've loved SM since I first played it around '95, so I'm biased.
Samsara has had harsh words, no denying that, but I acknowledge that sometimes being blunt is the best way to get your point across.
Something I have said repeatedly with regard to branches and routing is that if a given route or branch provides a distinct viewing experience from other routes/branches, it is worth publishing. I have to admit, though, that my tolerance in this respect is strained by the idea of 4 or 5 13% Super Metroid runs.
My view is not as harsh as Samsara's; what I would personally like to see is the fastest 13% routed to avoid underflow, and any% routed to exploit it.
Also, I'm fairly sure it should be called "underflow," as the numbers go below 0 and jump to a very high number, similar to horizontal zipping off the left edge of the screen and appearing on the far right of the level in the Sonic games, which has always been called "horizontal underflow." "Overflow" would be when the number goes too high and drops to 0 or goes negative, such as when you kill the Lavos Core with an Elixir as in
[1285] SNES Chrono Trigger "save glitch" by inichi in 21:23.98.
EDIT: Something else I will say is that the underflow glitch bores me personally, but I'm very familiar with Super Metroid; it would most likely elicit a much better response from a casual viewer.