BuildCraft version: 1.12.2
Forge version: 14.23.4.2747
Link to crash report or log:
Singleplayer or multiplayer: Single
Steps to reproduce: RF powe from other mods do not connect to BC Quarry or machines.
Additional information:

Completely intentional, Buildcraft no longer uses RF (nor Forge Energy) and instead uses its own MJ again.

So, No way to store Energy then. Buildcraft has become racist. :-p lol

That's certainly one way of putting it 😝