The only danger is having your foot slip off when you're going fast, and having the pedal come around and break bones - if you're not worried about or can't see it ever happening in your situation, rocking platforms is fine enough I'd say. I rode my winter FG on platforms right up until Tuesday night as it was just more ideal for me on ice/snow.

I personally will be putting eggbeaters on my newer FG build, the idea of platform fixed scared the hell out of me, but it's not super crazy - I ran that way since Jan 1 this year, so... I was also easily able to trackstand. I could also skid - but honestly it was a lot of effort to do (can only use one foot/leg) even with 42:17 (66 or 69GI I forget)