Very small minority use macros. You can watch videos of people playing and watch their keystrokes on both physical keyboard and virtual. I recommend kujo on YouTube.

But yeah, very nice memories indeed. Apparently, it’s making a comeback on Steam.

GunZ

StarCraft Broodwar (need to make a Blizzard account now apparently)

250US$!? With those hardware specs?

Pretty much nothing, because 99% of what everybody uses is proprietary blobs on top of Android anyway. The Andriod open source is absolute minimum barebones, with MS Paint like UI and basically no UX.