Strange how peoples experiences are so different on distributors. I had my old DM2 distributor's centrifugal advance mechanism replaced with the still old but improved 25D assembly & custom advance curve. Have had a Pertronix module & coil installed for years. The rotor is a 40 year old Echlin brand, the cap is about the same age. Even the wires are pretty old but still in good condition. Engine runs smoothly & strongly to 6,000 rpm, 9.8 to 1 compression ratio, nary a problem.
I have a spare Lucas rotor with rivet removed & set in JB Weld, it's tested & kept as a spare, but I doubt it will be needed. I suspect part of the success is in keeping the plug gaps to no more than .030" which reduces insulation stresses on all related parts.
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