Manual skills
The Athr is a tool like so many others, in my view it works quite well, even in windshear conditions, Sometimes we are forced to fly manual in less that perfect conditions. e.g. The visual part on a tail wind non precision approach in those case the athr lowers workload by allowing the pilot to pay less attention to the airspeed in his scan. The Athr with the gs mini function does a good job in windshear probably better than a human pilot would.
Since everything can fail I practice fully manual flight regularly. For me it is also important to practice manual flight with the athr on, so I won’t only be confronted with the sensation of flying manual with unmovable thrust levers when I need to use the system on a windblown non precision approach.