Back in the 80s my parents taught me to say choo-mer-ick, and said it that way every time, and I remember all the TV chefs of the day seemed to say it the same way.
A couple of years ago my parents laughingly disparaged anyone pronouncing it choo-mer-ick, couldn't believe anyone would ever say it that way, how ridiculous 🙄 They now say tur/ter-mer-ick, as do most of the TV chefs. I've no idea when it officially switched over.
I also remember them laughing at me saying ter-mer-ick in about the 00s. Such a weird thing to get hung up on.