We have no idea what percentage of X’s are experiencing this issue.
Probably all the ones that go in for wheel alignment... or 1 year service for starters ... based on my experience turning my car in , it was perfect going in and after service developed the dreaded shaking
.. it’s a totally different ball game when aligning big wheels to the suspension .. the tolerances and machines are totally different than for regular 19 inch wheels etc . had a mercedes gl 550 with big tires ... went in for alignment and had the same problem ... vibrating with hard accel and at high speeds ..they had to send the car to a place specializing in big rims and tires .. and after that it was fine ...