October 1st 2024 minimum 5 characters username techcommunity

My username is ElB and if I understand correctly, a username must be at least 5 characters from October 1st. If not, I thought I read that the history of your account would disappear.

Yesterday (October 27th) I happened to get this information by clicking on this link in an email https://techcommunity.microsoft.com/t5/planner-blog/task-management-tips-for-planner-beginners/bc-p/4255599#M2525 I don't see this information about this restriction anywhere anymore and I can't reproduce it anymore.

I find it strange that this important information with its great impact can now not be found anywhere easily and quickly. Even in my profile I don't get a notification and information!

Who knows more about a required 5-character username starting October 1, 2024? Please provide a source!