Finally got a diagnosis of FTD in 2018 but he had his first hospital stay in 2016. He went into full time dementia care in November 2019. He is now at a stage where he needs a walker even to go a short distance or he would fall flat on his face. He has Parkinisms as well. it’s a hard road for everyone thanks.
As you can imagine, with any individual "guessing", it depends so much on overall condition, care, and happenstance. Anyone's experience with dementia is as individual as his or her own fingerprint.
I sure do wish you much luck.
So I would say just enjoy whatever time you may have left with him, as this journey will be over soon enough.
My late husband was diagnosed with vascular dementia in 2018, though was showing signs a good year before, and because vascular dementia is the most aggressive of all the dementias, with a life expectancy of just 5 years, I knew he wouldn't be around very long.
He died in 2020, and now in retrospect, I am grateful that his journey of suffering wasn't that long like some with Alzheimer's who can live for 20+ years with it.
May God bless you and keep you.
My SFIL had Parkinsons and Lewy Body dementia. I think he lived about 8 years from diagnosis, if I recall correctly. He also didn't have any major health problems but balance issues and falling were occuring regularly. He lived out his last year in a county Medicaid facility, so not the best care.
Might go on for a couple more years.
Sending support your way!