Michael Reichmann of the excellent Luminous Landscape site, during a review of Sony Compact HX5 travel zoom, said that in his experience
many amateurs burden themselves unnecessarily with bulky and expensive cameras when something smaller and lighter will do.
He goes on to say that serious amateurs and pros don't always need their dSLR's or Medium Format Camera (hellishly expensive) and sometimes a simple compact is enough.
Mike Johnston of theonlinephotographer did an interesting piece on two lens kits.
Thom Hogan did a piece about going out with a fixed lens and go out and take photos. He was advocating a lot more than that but.....
When I was holiday I took a bag full of lens, on the Saturday I walked around Mottisfont Abbey with a dSLR with my big telephoto zoom on one shoulder, a dSLR with a big macro on the other and the panny in my belt bag. On top of this I had a pair of bins around my neck. IT WAS A LOT OF WEIGHT. And I decided that I was being stupid.
For most of the week I totally changed what I did. I took out one dSLR with a lighter telephoto zoom with less reach (70-300 as opposed to 80-400) and used the panny for landscapes (the exception was in churches when most but not all were with a dSLR).
I actually found this quite fun. Yes I made some compromises but I took some decent photos and I enjoyed it.
My point of all of this is I actually had to THINK about the photos. And yes it is nice to have flexibility of having a choice of lenses but if the weight of all those cameras and lenses hampers the enjoyment what's the point?
In the old days we bought cameras with a fixed prime lens an no zoom! Did this stop people's creativity? Of course not. A fixed focal length lens make you THINK not just snap.
Of course as Reichmann says its a matter of horses for courses. You don't have to spend a fortune on dSLR's (and a bagful of lenses) or one of this new compact interchangeable lens cameras. Just pick up even a simple compact go out experiment but most of all have fun.