I am with Knotted on this, I LOVE my Frogs and I also really like my Sun Ringle Zuzu BMX pedals. You can certainly ride a good quality set of platforms pedals for a gazillion miles without being attached to anything.

I am only riding Frogs on the road because my knees really need that attachment - and the Frogs have the right amount of float for me. If I don't clip in then my knees hurt after the ride. If I clip in, they don't I strongly dislike the pedals that have platform on one side and a clip on the other - but some people like them. I use BMX pedals on my mountain bike and will for the forseeable future - I am far from being skilled enough to add that to the mix.

In the end you need to do what makes you feel safe and confident. Personally I wouldn't go with cages or mini-cages and just stick with good platforms - but you are the one who needs to make that decision.