TBH, it sounds like she just wants a shiny new watch!
I've got a series 4 and, again, absolutely no rush to change it. It was the Watch that alerted me to my heart playing up last weekend, which made me act and speak to my GP.
I'm long past chasing new tech - all our Apple stuff just goes and...
And, by way of comparison, just peeking over into Samsung-land, I read that the Samsung Active Watch 2 was released in 2019, and support for it ceased in 2022.
Far be it from me to question your good lady, but the most recent Apple Watch out of support is Series 3, which was released in 2017, so is six years old. (She may have bought it later than that, obviously).
And even though it's out of support, it still functions perfectly.
I have Sonos...
I'm currently in a small tent outside the Regent Street store, ahead of Tuesday's "Wonderlust" event.
As soon as I get home, I'll get right onto this for you.