I grew up in the 1970's and 1980's, when Kodak film was king in the US. I went to school in a town of 1,300 people, and could walk into the one grocery store we had in town and get Kodak Gold 100 thru Kodak Gold 1000. The local drug store carried that plus Kodachrome 64 for a slide film. If I wanted Ektachrome or anything faster, I could either go to the drug store in the next town over (15 miles away) and get Ektachrome 100, 160T, and maybe Ektachrome 200. Back then, the Wal-Mart 30 miles away had all of that except the 160T, but they also carried Ektachrome 200 and 400, and the prices were better than at the drug store too. I'd heard of Agfa, and I knew of nobody that shot Fuji. Ilford? What was that, some sort of off-breed film? I first heard of Ilford in 1985, and it was their B&W paper we used to make pictures in a pinhole camera for shop class.
Then, at least here in the US, if you were the average person off the street, and you took pictures, they were on film. And if they were on film, it was probably Kodak. Sure there was 3M (Scotch) film and some private label stuff, mostly made by Ferrania (though I didn't know it at the time), but most photos were made on Kodak film.
Now, I shoot Fuji and Agfa slide film, Ilford panchromatic B&W, and Rollei/Agfa B&W IR. I probably shoot more B&W than I do Color Negative film. I probably shoot Kodak the least of all the manufacturers. How far Kodak has fallen, but I'm so happy to have easy access to the other manufacturers' products now, which I certainly didn't have back then!