Depends on how and where you like to tour of course, but one of the advantages of folder touring is that we have the multi-modal option. If you break down and do not have parts or tools to repair on the spot, then just start hitchhiking or call a taxi or Uber. Actually, I'm really interested in incorporating hitchhiking into my folding bicycle touring to cut out the boring and dangerous ride sections.

I'm personally into ultra-compact touring and can fit my entire touring rig (Brompton + T-bag rigged for camping) on my lap while riding in the front passenger seat of any car. Tools/inner tube/pump for minor repairs, flat tire, and adjustments are permanent resident inside the bike's frame and seat tube.