It's the lopsided dish tension that absolutely does cause the heads to snap on the drive side. I doubt there's a no breakage 50% survival rate on a 4,000 mile tour anywhere.
I recently saw a video of 2 young guys doing LEJOG on not bad hybrids with max 40 lbs load. Snapped a spoke on the 5th day. Backtracked 20 miles to a LBS , where they took extras with them. Day 10 another one broke, fixed themselves in the pouring rain. LOL.

Then there's Brit Mat Ryder who did the GDMBR from Banff, TransAM. NZ divide and LEJOG next. So a lot of rough gravel on wider rims and 2.4" tires.
He used both a Kona Sutra and a belt drive Pinion C12 which also has a deraileur cassette hub.
BOTH Failed miserably in less than 5,000 miles. The pinion hub twice developed a rattle sideways slop. And besides that one rim cracked at EVERY spoke hole. How the hell is that possible?? LOL I think it was a WTB rim. He tries to buy good stuff. We'll see how/ if the new HOPE hub lasts.
I did ask him why nobody uses a wide SS hub of some sort with Pinion and belt.

Another guy doing TransCan on muddy trails had his OB crank bearing go lame in a lonely stretch in Ontario. It was suggested he use an orange peel to prop it up till he got to an LBS. LOL.
Better take mine and cyccommute's advice eh. 2.3 head spokes are EASILY twice+ as strong.
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And you can't re-use spokes?? Yah not plain junk 14g. LOL.
I decided to change my 2012 first build SA XL-FDD from 3x to 2x after 28,000 miles. So all the hub holes had divots and all the spoke reseats are going the other way now. The recut did take off the nipple threads. When I move on to the new hub I bought already, I will likely use these spoke again. LOL. Just throw out the locking nipples that get rounded.