I dont know of course. Im aware that people without issues tend to stay quiet.
But the number of issues Im reading about in both Wahoo and Tacx owners group seems very high. It is very common to see people that have gotten their trainers replaced 3-4 times.
Personally I have had several trainers replaced, Kickr Snap(noise), Neo2(power reading 10% high), Neo2T(noise) and Kickr20(noise), and I have never owned a trainer for more than 1 year.