[cstejerean]

It's still a good idea to separate markup and styling. In the interest of getting things that look decent out the door quickly it's often necessary to postpone ideological purity.

If your idea proves successful then over time you will need to evolve away from bootstrap anyway, and you can get cleaner markup and style along the way.

If your idea proves unsuccessful, good thing you didn't waste too much time on a pure semantic markup.