Hello99 wrote: “Also waiting 3 hours after meat has no basis in Halacha or minhag,”
Waiting 3 hours after meat is a chumra. It is a chumra on the Minhag of waiting 1 hour after meat, which does have a Mesora. In fact, many Rishonim in Ashkenaz held that no waiting is necessary at all. Therefore, 3 hours is certainly enough for members of those communities.
For personal reasons, I did not change from my six-hour wait, although I am not makpid on my children.