Bootstrap or foundation, which is more practical at the moment?

Question

css

What did not like this indication of everything that is possible and impossible in EM? REM in the foundation. As for me, nonsense ...
What do you think? What do you use?
I would also like support for flex-grid.

Answer 1

I switched to foundation, I don’t regret it a bit, but if you mainly use flex, then in all ie, including 11, there are problems, the dislike for rem is incomprehensible, for me it is more universal