I think that there is a subtle shift going on, based on this: https://www.npr.org/sections/health-shots/2022/07/19/1112229721/u-s-debates-a-summer-booster-for-people-under-50 They actually mention 'original antigenic sin.' They actually give time to the the idea that more boosters might not be the desirable thing to do. It's not much, esp because part of the 'hesitation' is "well it might confuse your body for the NEXT UPDATED round of vaccines we are rolling out"--but if they are allowing this info to be broadcast on National Propaganda Radio, I'd say some producer or editor there has gotten a new memo....