As a former alignment neglecter, I once did a 6 hour drive with my previous car and for a little while I thought the road just started getting bumpy, but by the last hour of this trip the car was increasingly wobbling so bad it felt like all the wheels were about to pop off bc it was so out of alignment. I was going like 55 on the interstate bc it was making noises and shaking and like grinding sounds and the idea of pushing 70 just felt like it would destroy the car.
Immediately got 4 new tires and an alignment and it was like new.