Because it is a mirrorless, the lenses are smaller and lighter than a SLR. I will carry a 12-40 2.8, a 40-150 and a 1.7 20mm prime with me. I changed to a mirrorless Olympus from Canon because of size and weight while travelling. If I had the same set up with my canon, it would be all of my carry on ;)

Of course you can have a go, just find me, I'll be around :)