chain rotation is nice, makes them even last longer..! you can also don't do it and fit a new chain when the 1° is over in an 'old' cassette and after some gent

chain rotation is nice, makes them even last longer..! you can also don't do it and fit a new chain when the 1° is over in an 'old' cassette and after some gentle rides it'll settle there and stop skipping (at least 2-3 times till the cassette comes to an end). you can even rotate the crank cog when you change your chain, so you have less tear as the crank arm tends to make pressure in only some parts of the cog (aka. concentric movements)... but i can't see a case where you destroy a chain in weeks, with our without rotation, doesn't matter if you are a 100 kilos or a 55. maybe without doing any cleaning and no oil, still i have my doubts as i rode for some months as a test, with my chain without oil just to check how much it would last! in my defense i cleaned it every other day or on a daily basis if there was rain (also i had mudguards)