Middle class in the UK is very different from middle class in the US though. Being stinky rich and having lots of staff means nothing. You can have all that and still be working class through and through.
Kate’s background is not exactly middle class as some might think of it. Maybe lower middle class at most. The middle class ideal, while still mocked by upper class and working class is definitely perpetuating itself as the ideal. Very similar to the Victorian ideals. Loving (traditional) family units, well mannered children playing in nature, a beautiful women creating a warm home.... it’s what all successful mummy vloggers/bloggers sell. That is what the middle class aspires to make themselves relevant and aspirational. Working class is either mocking it or trying to copy. Upper class is already mirroring it while still maintaining a snobbish attitude. I mean it is much easier if you have the connections, education and prospects. As well the the private estate to play farm on.
Wiliams and Kates PR is as obvious as it is good. They adhere to the current ideal. Middle class feels uplifted, working class won’t care and the toffs notice the tiny differences in the approach that show the royals are still upper class.
They will have to find a balance though. Embody the ideal but also the gracious, dutiful royal that cares about the lot of their people while also socialising with the elite. It was a good the decision to put the Cambridges up front. We all know how a anniversary video of Charles and Camilla would have gone down. But cute videos are not enough. They need the numbers to back it up and they are not exactly good at covering the regal side of things. Putting your money on the younger generation is smart. Charles reputation is tarnished. And while many might think he redeemed himself, he will never be off the hook. His reign will most likely not be long and there are concerns about his health already. At his age he could just drop dead and it wouldn’t be unusual. HMTQ might actually outlive him (not that I wish that on any parent). To ensure this dynasty surviving they need to implant them now. And that is exactly what they are doing. In the end- Europe is doing extremely well compared to the rest of the world. Those monarchies make no real difference for the life of the people like they used too. There is no real gain to get rid of them. It would be just symbolism. And I think we work on more pressing matters that actually hold influence in our societies.