Lots of food for thought!
Liesbeth, I wish I could apply the "do you want to wear it right away" question, because that's usually a good gauge for me, but it's still in the 90s here and probably won't be sweater-weather for another month or two. I have to shop early, though, because the things available when it finally does cool down here will be too heavy.
SarahD8, your reply has so much wisdom. Thank you for that. You're right that I've been working from home for many years, although "working from home" used to involve quite a bit more "working from a cafe" or "working from the library" than it does these days (cafes and libraries still aren't open at all in Los Angeles).
Thank you to those of you trying to find a way of keeping the old favorite around. I'm not a big "change into loungewear" person. Since I work from home, I tend to just dress comfortably all day rather than switch from work clothes for the evening. When I do slip on a topper over my pajamas (say, weekend mornings), I tend to go luxe and grab my cashmere duster.
nemosmom, I love Naadam, but I suspect their chunky cardigans are just too warm for my needs.
Truth is, there were reasons I had a replacement for this sweater on my list, and I'd probably do well to remember those--the fiber content makes it too warm to get as much wear in California winters and, though I am A-okay wearing clothing with signs of wear, it's starting to feel a bit more like a grubby blanket (it's not actually dirty, though!) than a cozy cardigan.
I'm leaning towards keeping, but we'll see how it works with a few of the other things I've ordered.