Not the GP, but I recall the KeePass password manager using xdotool for its autotype feature. I struggled to get xdotool to work correctly back in 2014 on a Debian 7 personal computer. Not familiar with 'x2x' or 'xev'
Don't agree -w/all this cynicism... (Did I get a programmer's joke to work?)
Your fastest open-cycle resource usage is water. If you can recycle your water, you've got much slower mass-growth per unit of time in free flight. This could make the difference between 8 hour spacewalk capabilities and 8 day spacewalks.
I've wanted to do this myself... Tho as both an armchair engineer and an armchair programmer. If I'd gotten through engineering in university, (and studied programming language design) this would be an utterly tempting idea for me to try. I must have come back to thinking about doing this ten times in the last fifteen years or so. Off the top of my head, scientific models also sound like they might fit with constraint modelling, tho I might be far too superficial in my understanding of both subjects there.
Pegasus (company's first try overall), Antares, all of the Minotaurs, Atlas 3 and 5 might count as new... Epsilon, H-2 (new?), Vega, Ariane 1, 3 & 4... And the Ariane 1 is both totally new on a systems level and an institution's first attempt at building one. Long March 5, 6 & 7.
Of the investor-backed launch startups, I think it's either no company got it first try... or Orbital Sciences counts as making it first try with Pegasus. Not sure if they count as an investor backed startup.
You could probably get even better walk-able integration by connecting together multiple floors worth of hallways, one above the other. That could approach a 3D city a little bit more.