Do you get rid of things because they are old-fashioned?

It would be depressing to think you had to stick with the first things you bought until the day they (or you) die. I don't see anything wrong in having a change if you try to rehome the old items. Most can be sold or given away.

12 years ago, I decorated my house in a style that is very 'in' now. I see it with very different eyes, now I see similar in other places. I haven't redone it yet, but yes, I will as soon as I can. It isn't that I don't like it now it's popular, but I'm critical of it now because I've seen too much of it.

I'm thinking deep green next time. And maybe some black. Knowing my luck, THAT will become popular. It's happened to me a couple of times and rather than being flattered, I find it irritating.

Speaking of which, I desperately need a new kitchen and other than super plain white, which would show every speck of dirt or very Scandi knotty wood, I really don't know what to go for.

When I married I took on quite a few antiques without thinking it through. Some pieces are quite nice but my taste has changed my DHs has not so we won't be changing anything.
Clothes wise I give to refugee camps what I don't wear not because it's out of date. My daughter and daughter in law give me the GC clothes for the refugee babies and children.

Keep what you love and only replace if you no longer feel the same.

I would get rid of things if I no longer liked them, but not because they were old fashioned.