When Does Long-Distance Stop Working?

ALCB

Hello. I was wondering—when does long distance caregiving stop working? I understand that at some point my grandmother won't be able to navigate technology/understand how things like FaceTime work, but I don't really know when that happens. If it's helpful, my grandmother is 82, lives with her husband, still physically able, kids are ~30min away, and about stage 4 but starting to show stage 5 symptoms (long-term memory loss, confusion over family members). She is undiagnosed (😤), so no medication for the Alzheimer's.