I'm totally new in the photography hobby so for now, I'm babying my E-M1 a bit. Padded camera bags, screen protectors from day one and what not. After all, these are quite expensive toys. But then it got me thinking, some DSLP shooters moved to the micro four thirds world because of the portability among others. So I was wondering, is the E-M1/E-M5/E-Px durable enough, say with a lens (24-40mm or 45mm or pancakes) to be swimming with your other stuff in your backpack without proper padding and stuff? I guess this can only be answered by people who had their gear for quite a while and if they had experiences with having their cameras in their bags with books, tablets, and other stuff without experiences of lens mount loosening or buttons falling off (I'm not much worried about scratches). Thanks for your opinions and experiences.