Nothing worth speaking of, but I made lots of mods, and despite years spent in real recording studios I still find a tracker to be lower friction for sequencing than "real" sequencers. When I was a kid with a C64 and later an Amiga, the demo scene was about the only software development I had any exposure to...so it certainly had an influence. But I think if I could go back in time and give my earlier self a gift, it'd be a UNIX system with proper development tools.
Actually, I am very amused by the technological creativity that such groups demonstrate. It not only requires a strong sense of aesthetics but supreme coding skills as well.
But, surprisingly, such groups are not very known in startup world. I don't really know whether startups and demoscene should related in some manner but I find it odd that such a connection does not exist.
During the 90s I tried to learn enough to code some intros, but the learning curve is super steep to do something like your demoscene idols create. Also tried to find momentum here in Chile but failed, so finally I joined a mostly European team called 'Ethereal' which produced at least one demo:
