Let's not forget....
Going forward, there'll be more EVs / Hybrids, which will require more specialist work, so our "back street" mechanics aren't going to be around for a hell of a lot longer.
As it stands, I have gone to a "back street" mechanic for much of the last 15 years, only up see his business boom, him diversify into car sales, alongside car servicing and repairs, and his prices shoot up - all while waiting times get longer, and the one great customer service disappears.