Playing a game in a swamp biome right now, wanted to play somewhere I haven't before but it's been a bit strange to build only heavy or light structures even though things like Solar Panels, Hydroponics Basins and all kinds of crafting benches like the Machining Table, Art Bench, Tailoring Benches and Smithies all require at least medium support. Also no room for Research Benches either.
Also Steel Barricades need medium terrain too (thinking about mech clusters.)
After I hovered over the visibility of terrain icon it made me even more confused.
It's a bit weird system. The whole city of Venice was build on supportive sticks in the water during the medieval times with stone cathedrals and all, but in Rimworld you can't put a wooden research bench on a bridge tile just because.
I'm using Strong Bridge mod, which enables you to put heavy items on vanilla bridge. I like to play on coastal maps, and use the coast to build certain structures, in that sense this mod has been really helpful.
Strong Bridge mod:
https://steamcommunity.com/sharedfiles/filedetails/?id=2105613951