I'm guessing you are a little harder on the acceleration from a dead stop, banging thru the gears, and down shifting quickly multiple times to take advantage of engine braking more than I do lol. All of those are tough on chains.
Today's chains really don't need much lubrication..mainly light lubing to keep the side plates from rusting, and very little adjustment over their life depending on how they are treated. Mine mainly get adjusted when putting on a new rear tire, so about 8-10,000 miles between adjustments. They really are light years ahead of the chains we had in the 60's. 70's 80's and 90's. They are excellent as far as chains go.
Thing is, a shaft system will go many many times as long as the longest lasting chain and sprockets on a few ounces of oil and some grease once in awhile.
Who here would buy a chain drive car? (BTW Honda used to make one)
2018 Yamaha FJR 1300A
2014 Honda CB1100 DLX
It doesn't matter what I ride, where I ride, how fast I ride, or how far I ride... it only matters THAT I RIDE...EVERY DAY. "Ferret"