Matt Whiting wrote:

That is the main flaw with partial panel practice. You know the gyro
has failed. In a real failure, you may well not notice the failure
until it is too late.

You will know it pretty eimdiately, *if* you are not too lazy to
permanently do the cross checks. Cross check possibility is the reason
why you have all those "useless" instruments like VSI and turn coordinator.

Stefan