That is Porsche in annual road inspections. Meaning, owners of Porsches make sure they are regularly maintained. If you have the coin, you can keep anything on the road.
Porsche are extremely reliable for race cars, but race car reliability and road reliability are two different things.
The Porsche that I've been around were plagued with cam chain tensioner problems and oil circulation problems at medium mileage (50k mi. +). Newer ones have had problems with the metal used in the engine crank cases. If replaced under warranty, it's no big deal. If you have to pay, keep $8k+ handy for a new engine and labor. All Porsche have dry sumps. That means 12 liters of synthetic oil at your oil changes ($120 if you do it yourself). Newer Porsche have really big, soft and expensive tires that last maybe a year at normal mileage. That's $800-$1200 / year. I don't know about the brakes, but I expect they need maintenance every other year at twice the price of an ordinary car. Plus, the fuel economy is 2/3 that of a Camry and 1/2 that of a Civic.
I haven't even started on all of the expensive electronics that can go south, or the plumbing. Porsche have water radiators and oil coolers in the front and 16 feet of pipes and valves running to the engine in the back. The radiators can be easily damaged because they are mounted low in the front bumper.
Mind you, if you have the coin, go for it. I'd get a 993 (made from 1993 to 1998). Last of the air cooled. They fixed most of the problems and fitted a great rear suspension. Interior is really awful compared to even a Lada today. But, filled with character. I'd buy one in a NY minute if I didn't already have two cars and live in a big city.
"The key to success in this business is to find a boss who doesn't care." - Mike Rowe