This is my HiFi childhood. My first hiFi was bought in 1970 ish and by the mid 80's, when the digi revolution was kicking in, I was spending lot's more than i should have orta done.
A young man in 1970 I read no magazines, and just went to my local dealer (in Swansea) who happened to have a Thorens TD150/Rogers amp that I could afford. I bought them and made some speakers to hear things with.
By the time the 80's arrived i was more aware of HiFi as a concept, and read stuff/haunted local dealers to hear stuff. Moving from london to Ryde on the isle of Wight introduced me to a couple of blokes running a dealership who happened to be very anti 'flat earth' products. I guess that they had had some interesting experiences when neglecting to stock Linn/Naim etc. Man were they angry lol.
Instead, they were selling Audio innovations valve amps, Townshend and Pink Triangle decks, Snell and SD acoustics speakers, Micromega CD players and anything else that wasn't from the 'other side'.
The split was stark and very obvious then. You were either flat earth, or you were NOT. (I guess a few lonely souls plowed their own path), and I was NOT.
I was however, pretty unbiased. Much as I liked my pals at island HiFi, I had my own ears and taste, so never declined a chance to compare and upgrade.
In the end it all should be personal. I've stayed away from the Linn Naim etc stable since simply because, on audition, Pink T and Townshend slayed the LP12, but that was just me.
Although I did, by the 90's, get a bit fed up with the sales tricks and cons at demo from some makers reps. Ah well.