I prefer hope feel but the main sticking point is the unavailability of spares and the harder to find fluid if world touring. I like to be able to carry a seal kit and use dot fluid
Have you got that the right way round? Hope offer seal kits and use ubiquitous and cheap DOT fluid, whereas Shimano aren’t fixable and use expensive mineral oil. And have had significant reliability issues.
I wouldn’t go for belt drive as if you do snap a belt you’re screwed. Chains can be fixed with a quick link.
If really do want to world or even European tour then I would (reluctantly) agree 2×11 is the way. You want enough top end to keep spinning down some massive pass, and enough low end to winch your knackered self up the next one laden with kit.