My first experience was a friend back in the 80's. My friend decided to buy his after the lease ended and he was livid since he paid sales tax at the start of the lease and then again when he bought the vehicle after the lease.My FIL jumped on the leasing treadmill so he could drive a Cadillac. He bragged about how they kept asking him to turn in his lease early "because he took such good care of them". When he passed, my wife and I were trying to sort out her mom's finances and the car lease was up. My FIL didn't realize the dealer was rolling over the lease payments into the new lease. My MIL was paying for cars that were turned in two cars ago.
We finally got her back on even ground.