Customprintwales you appear to have slightly misunderstood.
Big difference in a mug being in a dishwasher for 2000 cycles and being clanked against each other, thrown in sinks, banged on a surface after every sip, pulled out of a cold cupboard and boiling water poured in etc. The comment is the life cycle of a mug, not how many times it can sit in a nice warm dishwasher, limited expansion and contraction, limited physical impact and a nice gentle wash. Just leave it dishwasher and it'll probably never be broken.
Big difference.