Apple is most certainly not the company you want to purchase products from if you're afraid of major updates. They are far more aggressive and eager to break things than Microsoft.
Back in 1991, there was an uproar, an uproar I tells you, because System 7 required nearly a megabyte of memory instead of the 600K System 6 could run with. Sure, most users barely had more than a megabyte of memory, but it paints a pattern for sure.
I'm afraid of major updates and I'm using Apple. I usually wait around a year before updating and that works for me. They release security fixes for old versions.
Moving from Windows to Mac because you hate updates is like moving from Ubuntu to Red Hat. It's more of the stuff you hated except you don't realize it; ignorance is bliss?