I've posted before, my comp carbon 2018, got 3,000+ from first chain replaced with Sram same as stock ( could not notice any difference or improvement with new chain on ) now have just over 3,400km total on the bike, it shifts good. I did a 50km group ride yesterday. and with the new update 23 firmware and the infinity tune, the 3.0 x 27.5" ground control tyres. the bike is magic to ride. another rider that has always been all peddle just got a new Trek with E motor FSR he rides at a slower pace but loves the bike, I noticed it has very very low gearing, the crank Sproket was so small I could not see the teeth ( might be single track model? ). I'm still in love with my levo & since last service the ride is perfect fast over rough surface.
who know's why my chain lasted? I take bike to LBS they check the chain, I just keep it clean and lubricate with Rock N Roll Gold as thats what LBS recommended . I've not ever broken a chain yet. I average around 20km per hour ( like a 40km ride takes 2 hours )