I’ve used DID hard pin chains (219) on World Formula for years. I change them at the beginning of the season. I’ve never broken one due to just mechanical wear (only from wrecking one on a curb). In my opinion for 4-cycle the space chains aren’t worth the extra expense, especially if you’re already running 35.
We run the DID on our animals in road racing. I change the chain out at the beginning of the season unless I do something STUPID. Proper lubrication is critically. We run chain wax .