By the time the 16-bit computers came about, they were mainly in stores like Curry's and Dixon's, and very accessible. I had an Amiga 500, and most of my friends did too, except one poor chap with an Atari ST.
There was a one "mom and pop" type store in my town by the time I got to my late teens. They sold a lot of the big box Amigas, some PC's and import consoles like PC-Engine. But they closed in the late 90's. I remember buying a used black and white TV from their closing down sale for £10.
I got a Mac SE and Mac IIcx 6Macs and a G3 iMac. I don't use them I collected them over the years to see if they go up in value.
But, yeah, Commodore burned their retail network in the US time and time and time again.
Commodore made sure to fire designers promptly after every new product launch. C-64 custom chip designers founded Ensoniq in 1982, the year C-64 launched. Amiga team was "let go" before Amiga 1000 to 500 cost optimization redesign. This meant Amiga never got HD floppy controller - there was no one capable of upgrading PLL inside Paula.
Then we had to deal with customers who had just bought the same item in the last week or so.
Weekends spent doing protacker session, checking content of newly traded floppies, trying to stuff in 68000, and then coming home and trying to replicate something on a 386SX.
I was the only guy on computer gang that got a PC instead, due to the way my parents saw it as a safer bet for the money being invested. Somehow they were right, regarding how computer market evolved years later.
So I was floating between PC and Amiga demoscene.
Just found my original 300 baud modem and hardware/software moving homes. War Games, once I found out it was created on a Commodore PET, was a huge influence at the time. Not sure if I have a single monitor with an RCA connector anymore.
It might not have been exactly a Walgreens, but it was that type of drug store, with the electronics behind the counter.