I hate changes, and I do whatever I can, to avoid them unless absolutely necessary. This includes keeping friends forever, even if maybe the friendship isn't so good, and it includes continuing to patronize businesses in places I used to live, although they're now ridiculously far away to be convenient, and there are others closer, etc. We all have to sustain changes in life and livelihood, and I survive them, but it's seldom by choice. I have the same TV set that I've been using for 35 years, and I don't get rid of vehicles when I get another one, if I can figure a way to keep them all. I kept using a rotary dial phone all the way through the 2000s, although I know they can't be used to do things like banking and whatever requires touch tones. I don't like animated ring tones on phones either... I want a good old mechanical BELL, like a phone is supposed to have.
As far as my reaction to unwanted changes; I guess I just get uptight about it for awhile, and then I settle into the new (whatever). I don't recall having a meltdown over a change, but I have had episodes of disrupted sleep and depression, over such a little thing as a favorite cashier at the Taco Bell quitting her job and not being there anymore.
Probably the most glaring thing, which became one of my hobbies and special interests (aka obsessions), happened in January of 1986 when the County of Los Angeles stopped testing the Cold War air raid sirens on the last Friday of the month at 10:00 AM. Those tests were part of my life, and were as important to my brain as it's supply of blood and oxygen, LOL... The siren represented the advancement of time and life. When the sirens went quiet, I thought it was the beginning of the apocalypse or something. I solved the problem 30 years later by buying and restoring several air raid sirens (including the 500-lb Federal SD-10 which I am holding in my avatar). I know how goofy it seems, but it feels like my life is restored to normal, now that I have my own siren test day once again on the last Friday of the month. It's OK to laugh about it, as I laugh about it myself.
There are a few exceptions to my dislike and avoidance of change: I like to rearrange furniture now & then, and I do get excited to move to a new area usually. I've lived in about 15 places, but all within a 100-mile radius of where I was born & grew up.
Charles