FWIW, plodded along from Dublin to SW Ireland and to Aberdeen Swcotland [killing time and hanging out as well]

for 6 months , puncture free, Tour

thorn resistant thick P/V tubes and just one , 'thats not rock hard, but probably OK'
ride , back here, with an under inflated tire and the valve sheared to failure in the tube.
tire shifted on the rim and the tube followed it. <guess>.

on tour I kept the PSI up because I could feel the rolling resistance go up if they lost air. ..