Frankly,
Clipless pedals have been around so long, I don't know how one could think up a "con" about them. I really can't think of how anyone would miss (sure don't) having to reach down all the time pull straps tight or release them when a quick flick of the ankle does this with clipless pedals. And again, it's not like clipless pedals were invented yesterday, so it's entirely "period correct on a lot of C&V bikes.
Just go for clipless if you haven't yet, you won't be sorry.

Chombi