Speedrunning on the go
the switch is also perfect for portability. You can't record it unless it's docked, but you can definitely practice your speedruns for Switch games when you are out and about.
I assume that you can use this on the go but I'm not sure. But I use PPSSPP to emulate PSP games on my computer and use an XBOX controller to play them.
the switch is honestly perfect for ILs, as you can use the screenshot button to record your times¤ on the fly. ¤for games that don't need video verification.
some gaves have speedrun modes built in like Legend Of The Dark Witch on 3DS (I know episode 2 at least has Speedrun cards, which even show the times for individual levels)
I read a book or something else along those lines to hide my power level