Board Thread:Suggestions forum/@comment-25693704-20150708191602/@comment-25101089-20150710170332

No, it isn't 1.8. Most mod authors have not updated to 1.8 yet, and I am seriously doubting even doing so. This is because Mojang really pulled the rug out from under modders with 1.8 and the amount of work that needs to be done - especially for a mod this size - is so large, it's debatable whether it's worth it.

To get a taste as to why, and some expert opinions on this, see here, here, here, and maybe do some research on your own.

"Here's a question for you: Why bother? What amazing features does 1.8 have to make modders spend months to port their mods to it in a stable manner?" - asiekierka, BuildCraft dev, 1 month ago