Hi,
I use toe clips on my road bike and plain pedals on my folder.
No problems with either. With straps your toe should not touch
the front of the clip, so no toe issues, and the straps should
not be tight, just tight enough to help a lot but not hinder.
Getting your foot in and out of straps/clips is just practice.
In the city any sort of clipping system is a complete pain.
I've never had any sort of problem with plain pedals
using reasonable pedals and decent footwear.
Straps and clips don't belong on a MTB IMO.
rgds, sreten.