I can empathize with the author after moving away from Toronto almost 20 years ago, so much from when I was a teenager is gone. I'm not "from" where I live now, and where I'm "from" no longer exists, I just feel perpetually detached from everywhere now.
It's an ad hoc capture of the southland in the early 70s. I like to reference IMDB to try to see if the landmarks in the show still exist. Some do, some don't. The criminals used to live in some very nice houses up in Bel Air.
A recent example had Colombo at a winery. Well, the Pomona and Cucamonga Valley is where many of the wineries were back in the day. But, that's been transitioning away from that area for some time. The Ontario Airport exists where that winery was in the show.
But there's still vestiges of all that in the area, and the area is still in rapid change. What used to be dairy farms are all turning into warehouses or new residences. Yet, there's still that same old local convenience store on the corner in its 70+ year old building just down the street.
It's a very interesting place to just watch the change happen around you.