United StatesI've been able to, multiple times, trigger the speed booster from a standstill. It seems that you have to immediately start moving forwards after clicking in the stick for it to work. I have been able to inconsistently trigger it up to 1 sec after the click of the stick, but clicking the stick and starting to move right away has always triggered it every time I tried it.
Going from my first playthrough: There are bosses that require either missiles or a charged shot to take damage. There are bosses that do NOT require missiles or charged shots to damage. There are bosses that can one shot you with at least 2 full tanks with the gravity suit (on normal). All the primary upgrades at this point in time do not seem skippable, since they are either tied to the EMMIs, or are required in some other way (such as varia/gravity being required simply due to heated and cold rooms doing more damage the longer you stay in them). This game is geared heavily towards preventing sequence breaking, with the limitations imposed on underwater movement especially (you can not get higher than your initial jump height with space jump, can't wall jump, can't bomb jump higher than your initial jump height). There's currently no known way to short charge the speed booster.
With all this, and more, in mind, I wouldn't be worried about niche categories this early on. There should be 100%, and any% for both (assuming there's nothing for beating hard mode). That gives 4 categories to start, and lets people get started submitting runs. Mark them glitchless in the rules, forbid all forms of cheating, etc. As ways to break the game get found, then add new categories that allow glitches for the same types of runs. Bare in mind that this is the first metroid game that is in the age of updates, and anything found may be patched out. Runs for this game may come down to optimizing "legit" playthroughs vs finding ways to break the game - especially given this game just came out a few days ago. Also, any% != low%. Any% just means anything not 100%, it shouldn't mean a specific route is required.
I know this thread is kinda dead, however I would like to point out that DSP does not pause the IGT when you bring up the menu via the escape key. Also, if it's recorded in one whole run, then by definition it does not count as a segmented run. The only time the IGT pauses is when you go to the main menu, or close out of the game completely. Any runner complaining that someone is taking breaks, especially in a game like DSP or Factorio, should be disqualified for encouraging unhealthy practices. I routinely play games all day long multiple days a week, and have been since I was a single digit. The key is to take a break every few hours, and to alternate standing up and sitting down. Also, I have no idea why someone would be against taking breaks in a game were you frequently come to points where you're literally waiting for the game to catch up to you (construction drones building, waiting for hand crafting, waiting for resources early on, watching things to make sure you didn't make a mistake with sorters/buildings, waiting for a research so you can continue progress). There's only so much you can do in these instances, especially if you're waiting for a research to complete early on so you can build the factory for that particular item. There's literally no reason to not be taking small breaks occasionally with this game.
The current rules for any% specifically state that only 1 player is allowed, and then go on to tell you that playing in multiplayer mode (which is impossible unless I'm missing something) is recommended.