Following the introduction of Blue Buzz and the recent changes in the Buzz system in CivitAI, it is evident that Yellow Buzz may soon be completely retired in the possible near future. With Yellow Buzzes having been a staple in CivitAI for the past two years, their potential retirement can be inferred based on the shifting focus towards Blue Buzz.
While there has been no official announcement regarding this, it seems likely given the significant updates to the Buzz system, replacing the claiming of Yellow Buzzes to Blue Buzzes completely. Ultimately, only time will tell how these changes will impact the overall functioning of CivitAI's Buzz system, we don't know for sure.