Part of the problem is its quite possible to always drive with quite reasonable performance below the level when you may get these Engine surges. Some on here own the car for a long time before finally experiencing the 'quasi gear change' effect when accelerating hard for instance . I sometimes drive quite 'enthusiastically' and climb a lot of mountains . The engine may run quite fast, but I can count on one hand how often it has run anywhere near maximum revs, and then not for long. I often thrashed an engine harder than this in my younger days.

Its more a surprise than anything to be concerned or annoyed about IMO. Once you accept it for what it is ,and maybe explain to unfamiliar passengers " 'dont worry, they all do that ,and by the way those occasional bleeps and steering wheel warnings on the dashboard are not due to my bad driving" its much easier to tolerate the rare intrusions into the normal silence.