Now, was your loss of UAS the result of settling on a "forever" uke, or did it just kind of gradually fade?
I'm not sure if "forever" uke is the right term. I'd describe more like: I've found a uke that is pretty much everything I wanted. Maybe I'll change my mind later if I happen to come across another uke, but I'm not actively looking. So, for more than a year, I have no interest in uke shopping/buying.
The interesting part is before I came to my current state, I used to not believe anyone can be happy with just 1 uke when I read about "forever" uke. I never believed in "forever" uke, but I am now a believer. I used to think, you'd need tenors, concerts, sopranos, etc. but I can live very happy with just this 1 uke (I have to fess up that I still own more than 1 uke; but this uke, I believe, is what killed my UAS. I can be super happy without every playing my other ukes, and in fact, they've been inside cases for months and never played until only recently when I decided to hang them out... and even so, I don't grab them; only this uke is what I like to play.
I don't know if this is a blessing or a curse because I used to love uke browsing/shopping and (of course) buying. It was a lot of fun; now I feel no excitement in that department. Well, at least I don't have to dealt with wife saying "what?!! another uke?"
Oh, the UAS wasn't a gradual fade, it was like "I'm tired of opening new uke boxes and being disappointed" so after maybe 5-6 more ukes, I just say "no more, too much trouble receiving new ukes." And that's it. I went from browsing uke shops one day and not the next.