'Cobbles' on the Portuguese ended my 2017 Camino with trashed Achilles in both legs. It was to be for my 75th birthday. I was in reasonably good condition, but no amount of taping, insole changes, lacing changes, wearing of ankle braces could make it work. I started in Lisbon, walked a few days in the heat (also a condition I do not do well in), then alternated bus and walking to Porto for the final restart. Made to Pedra Furada before overcoming my excess tenacity and male ego. Took a cab to the nearest rail, rail to Lisbon, rescheduled my flites and went home to heal (took 6 months before I could comfortably do above 10k).
BTW I got some reimbursement from my travel insurance--would have gotten more if I had seen and been diagnosed by the Hotel doctor in Parque das Nacoes.
Glad to know they are setts so I quit badmouthing cobbles.