I appreciate what Horford did for the team and obviously the 2024 title. I'd argue his signing in 2016 to go along with the IT trade in 2015 really paved the way for the franchise going forward in getting back to contention and becoming a bigger destination for FAs which wasn't always the case in the past.
But it's also true he has left us twice, both times primarily for money. If the C's could offer more than GSW, I think he still stays. I've moved on though. Horford has also gotten a bit slower which makes sense because he's now 39, but this was true even last year and it was more noticeable in the postseason (same with Jrue). Another PF/C in the offseason or draft would be ideal but I like our duo of Vucevic/Queta for the next 3-4 years, hopefully with someone else emerging as a Vucevic replacement 3-4 years from now. Queta does give them a younger and solid building block, his development has been awesome