Screen Language is just a godsend. Games which used to need custom python expressions and ui.imagemap whatevers a few years ago can now be made entirely in renpy language. Even the interface of Katawa Shoujo which amazed me 2 years ago doesn't bat my eye nowadays. And I remember the FMV sequences in that game were made entirely in Photoshop and After Effects (like you once upon a time had to have "real" animation software like RETAS or Animo (now dead)).
Just last night I was customizing the interface of a game to feel like a Japanese game and I surprised even myself at how slick and very JVN-like the final result was. I'm finally, finally getting the hang of it.
The tools today are so awesome, so one of the reasons I stick around is I feel the need to stay within the scene lest I get left behind! It's a shame for the creators who made 1 or 3 games then moved on, but as for me, I don't have quite much skill in other areas (definitely not illustration or comics/manga or non-narrative games)... I'm in a perfect position to stay with the scene if it indeed continues to grow. Even if you are not so talented in the individual aspects of a VN (writing, art, music, programming), when put together what often happens is a miracle occurs and the whole is much better than the sum of its parts. So that gives me confidence as an amateur... I can put my work side-by-side with the newest download from DLsite (supposedly made by pros) and confidently say that I didn't do too bad.
The only issue for me now is not whether I have decent skill for something... it's whether I have the time and energy to make more content (Heck, at least I'm not aiming for works that go beyond 10 hours since even 10 hours of content is a lot!) That's one... and the second is if the content needs a certain flavor which I am not capable of delivering.