I've been waiting for railcraft and buildcraft to be updated to 1.16, but it hasn't been updated since v1.12 and it bugs me because these are 2 of my favorite mods. Are these mods not getting supported anymore?
Railcraft maybe - but there are alternatives like Immersive Railroading:
Currently, the creators of Buildcraft are working on a 1.16 version
That's disappointing. Oh well, I guess it's time to look into some new mods.