When I had my 2002 VW Jetta, I gave it 1 minute, or nothing during city driving, 2 minutes after highway driving. I crashed the car when it had about 7000 miles, so I don't know how well that worked. I used RTS 5w40 oil.
I give my 2010 Lancer Ralliart almost no extra time after city driving or highway driving. I use Castrol Edge Gold 10w30. I don't feel it will be a problem.
Auto manufacturers used water cooled turbo bearings to eliminate the need for cooldown time. I don't see modern tbo engines with problems so long as synthetic oil is always used. People who buy modern Turbo engines typically don't know or care about what it means, all they know is that they get good power and in some vehicles good fuel efficiency.
The most common turbo car I encounter is the VW Passat, a car not often chosen by people who would know or car to know what turbo means.
However, I have heard that some of the newer Diesel engines in 3/4 and 1 ton trucks now need to let the turbo cool down. I know a few guys that have needed replacement turbos on the Ford 6.0 and some of the newest Cummins engines.