BioSpark stated he would only start over every five attempts or so, and that's with ~15-60 seconds (depending on whether he returns to the save before attempting the 0% trick) between the start of the segment at the beginning of the sector and the place where you have to perform this ungodly hard trick. As for "serious" SS times and 0% SS, there are currently two SS 22% Metroid Prime runs on SDA, and I remember at least one of them to spend many minutes at Vent Shaft - sure, SDA standards have increased since then, but I don't think this run would be rejected today because of that - it's simply a hard thing to do on top of everything else that comes with running MP low% single-segmented, and that's for a trick that was discovered and performed plenty of times in real-time compared to what's necessary for 0% in Fusion.
Using the 1% ending as the new goal would remove 1% from the low% category - the reason it's different is that the possibility of 0% in real-time exists only in theory, but you can't submit segmented 1% runs because it's obsolete as the lowest percentage, so the category is effectively dead. See earlier posts for more in-depth thoughts on this.
ZM doesn't share Fusion's very specific, unique and, to my knowledge, unprecedented problem - assuming you're referring to the luckfest that is 9% Hard Zeebetites, 9% Hard is only possible in the EU version, and there are no runs for it, so the 10% Hard is fine since you can't get any lower on the version used for that run. While there's no real reason against having 15% runs, they're simply not necessary since the problem I'm trying to circumvent in Fusion isn't present in ZM.
Using the 1% ending as the new goal would remove 1% from the low% category - the reason it's different is that the possibility of 0% in real-time exists only in theory, but you can't submit segmented 1% runs because it's obsolete as the lowest percentage, so the category is effectively dead. See earlier posts for more in-depth thoughts on this.
ZM doesn't share Fusion's very specific, unique and, to my knowledge, unprecedented problem - assuming you're referring to the luckfest that is 9% Hard Zeebetites, 9% Hard is only possible in the EU version, and there are no runs for it, so the 10% Hard is fine since you can't get any lower on the version used for that run. While there's no real reason against having 15% runs, they're simply not necessary since the problem I'm trying to circumvent in Fusion isn't present in ZM.