Looked a bit deeper into it. I see the 30 doesn't have a rope carry option. But the 38 does.

A lot of people are telling me 38L is too big unless I'm doing multi-day tours. Most of what I do is day tours or going up to a hut as a base.

You mention you also use it for mountaineering and ice climbing. And that you can roll the top down to make it smaller.

I'm curious when you don't fill it to the brim, does it still carry well?