I think it was Reptile that explained it to me. Something about the caps etc distorts when you pull them apart, therefore they require all the work etc.

Great engines when they are together, they don't like to be disassembled and put back together w/o the full boat of machining.
Yes...I'm a proud member of the 200 mile motor club.

Also FWIW our rings seal well w/o wearing much. At 186K I still had cross hatches in the cylinders and the rings were in such good shape we could have reused them as new.