Trialed Libre 3 a few weeks ago for Abbott via hospital. I cannot comment on their accuracy because the trial was blind. What I would say is, I wore one on each arm and due to weight and size I wasn’t aware of them on my arms. They are not generally available yet, though I was given one to take home. Absolutely useless at the moment as they do not work on I phones, which is what I use. There are moves afoot to get the app on Apple but hasn’t happened yet.
Also, it doesn’t sound as though people will just change from Libre 2 as we did from Libre 1. Unless of course you purchase yourself.