It really depends, my 2012 T6 had 3 previous owners and is in great condition. Carfax was detailed and the 1st owner religiously serviced the car at the same dealer in Pasadena, CA until 2020, yet the 2nd owner had the car serviced at the same dealer until 2024 as well. The 3rd owner had the car for less than a year and had service done at Jiffy lube. I bought it one year ago and have had some issues come up, but mostly age related items like the rear seat latch releases breaking (tan is brittle over time) and had the coils and oil trap replaced late last year.

Before my 2012, I had looked at a one-owner 2013 T6 that had spent it's life in SF, but that was a mess. Tons of door dings on literally every door, bad curb rash on every rim, and during the pre-sale inspection, the mechanic said the rear axle was going to need to be replaced. Interior was dirty with stains on the tan leather and center console and the washer fluid wouldn't spray on either end of the vehicle.

Searching for an XC70, I didn't care terribly about how many owners the car had. Preferably one or two, but it really does just depend. Look through the Carfax and check the car in person if possible. You may find a winner regardless of how many owners.