the END OF GEMA

[Frogulis]

I can't see that happening, almost as soon I made 40+ Gema with G.I.Joe which was when I had the idea of putting invisible holes in the floor people made versions with the holes edited out.

Because the invisible holes are the equivalent of secret tunnels in @camper maps. They make the gemas rely less on the jumping and timing of the people playing the map, and rely more on knowledge of where the holes are.
Unfortunately, as the ability to make excessively tall maps disappears, so will gemas with large, skillful jumps. This means that more emphasis will be put on flat gema tricks (mazes, holes, long crouch tunnels) and less put on big rifle jumps and precision.
Or gemas will disappear altogether, but I don't see that happening. It seems more likely that we will end up with people doing whatever they can to keep gemas going.

tl;dr: lower ceilings make gemas less fun :D