[t0ps0il]

> How feasible are tubeless setups on long tours?

Very in my opinion, but I'm coming from a bike packers perspective.

Start the route tubeless and run it until it fails. When that happens throw a spare tube (that you should be carrying anyways) in it. If that goes flat, patch it.

Converting back to tubes is easy: take the value stem out -> put in tube. Yes, it's messier but it's not like you're showering regularly anyways.

> Being able to locally resupply with a compatible sealant is the main impediment

I would think that tubeless setup + plugs with spare tubes + a patch kit would get you far enough for this to not be a major issue. Carrying a small bottle of sealant would help. Worst case, you run tubes the rest of the trip.

Note: These are just my thoughts as a (formerly) sponsored bike packer.