Quote Originally Posted by Thomas Bertilsson View Post
Don't you think that it is BECAUSE OF the challenges that one 'everything' presents that make you a better photographer?
Well, yes, but with reservations. There are challenges and then there are challenges, as it were; trying to use a completely wrong tool for the job, like shooting sports with a wide lens on a large format camera, is probably too much of a "challenge" to be a useful experience.

Also, what's reasonable to take on will be different for someone who's strictly trying to develop their skills than for someone who wants to optimize the end product. I'd hate to feel that I *had* to decide to miss a shot because I'd sworn off that tool for the year.

I think it's important to make a distinction here that it's about fundamental qualities of seeing and feeling your way to the end result, and for this exercise you'd have to learn how to expand your capabilities to compensate for some of the challenges.
Agreed, and it's hard to say in advance what challenges can be compensated for, really. Sometimes a seemingly inappropriate tool works better than expected, and you wouldn't learn that if you reflexively went for the obviously appropriate one instead. Tradeoffs, tradeoffs.