Transitioning between stages of dementia; what is the in between?

It seems that a 'crisis' event can make the transition quite sudden, and then not be totally reversed when the crisis is over. UTIs, falls, hospitalisation etc.

Well, I think it varies so much, that's it's difficult to answer. Also, when you are looking at stages, I'd keep in mind that the Seven Stage chart is actually only for people who have Alzheimers and not other forms of dementia. However, I've noticed that my LO has pretty much followed it, even though she has Vascular Dementia. Perhaps, a coincidence. Or, one doctor said that she may also have AD as in Mixed dementia. Plus, she was young at diagnosis. Some people go many years with slow progression.

My LO had slow progression to the point that no one knew what was going on with her until it hit big with full blown Stage 6. (Four years ago.) Those things continued, along with double incontinence and being wheelchair bound, until she progressed to Stage 7 and that's taken about one year. Over that year, gradually losing ability to feed self, gradually losing speech, gradually stopping smiling, gradually needing support to sit up, So over the last year we are at 7e.

Since we are restricted in posting links, I'm going to PM you one that I have looked at it. I'm not sure if it has value, but, it's something. I know it gets frustrating and we want answers, because we are so apprehensive about the future.

I think everyone is different as far as how they progress through the stages.  My Mom has had Alzheimer's / dementia for at least 4 years now and she has stayed pretty stable.   Some may progress faster compared to others.   I don't think anyone really has the exact answer...