When should I decide to go into memory care?

Yes, I hate 3rd party posts. Very confusing.

Ten years, thats long for Dementia, but not Alzheimers. The AL can evaluate and tell you if its time for Memory care.

I'm with Countrymouse on this one. If you in fact were diagnosed 10 years ago with dementia, I find it very hard to believe that you would/could be so articulate with your words, let alone type them out properly.
Instead I think your forum name says it all. You're just a Nosy Rosy, who for whatever reason felt the need to pretend to be someone they're not.
And if it's a family member or friend that you're being "nosy" about, I can only imagine that the ALF would make it clear to this person that it's time to move to memory care.

You won't be the one to decide if your dementia has progressed to that point because you won't be competent to make that decision. Either your LO will see the evidence and request the transition or the facility admin will recommend it. If you start to wander then this will trigger a move to a secure wing in order to keep you safe.

If your daughter doesn't think you have dementia, then how does she explain the medical diagnosis, the aggitation, delusions and all the other very common symptoms? What is she doing to help you address those problems if she thinks they originate from another illness? Have you at least been checked for a UTI?

In my part of the world AL facilities are very proactive about telling people when their needs have become too great and they strongly encourage them to move on. Here the level of care in a memory care isn't much higher compared to an AL, it's more that exit doors are secured and programming is dementia focused, of course all the other residents will have dementia too so the dynamics of the group will be very different.

It sounds as if you are posting on behalf of the ALF resident. Full marks for taking a person-centered view of care planning, but it makes life a bit confusing for your readers.

If it were you posting for yourself, for example, you might also be able to tell us what you don't like about bathing, dressing, or going to the dining room, and what triggers the delusions that at other times you recognize as being delusions.

Never mind, it doesn't matter - so Daughter doesn't think you (or the person) have dementia. What does Daughter think is going on?

What advantages would Memory Care have for you/person over and above the current level of support, do you think?