&gt; There have been no effective new treatments and some pharmaceutical companies have dropped out of the dementia drug race.

There have been no effective treatments, period. But what's interesting is that there may be other non-pharmaceutical treatments that are better suited to addressing the problem of dementia.

Interesting emerging/potential treatments for dementia:

* Cannabis 
https://www.leafly.com/news/science-tech/the-medical-minute-5-ways-cannabis-could-be-helping-alzheimers-pa

* Mushrooms
https://newatlas.com/mushrooms-mild-cognitive-impairment/58825/

* Photobiomodulation
https://www.alzheimersrecovery.com/

* Low-level laser Therapy
https://www.sciencedirect.com/science/article/pii/S1011134416306765

* Near Infrared Light Therapy
https://joovv.com/blogs/joovv-blog/red-light-therapy-memory-recovery-prevent-cognitive-decline-alzheimers-dementia

* Low intensity Ultrasound Therapy
https://www.medicalnewstoday.com/articles/290801.php

* Stem Cell Therapy
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3984956/

* NAD+ IV Therapy
https://agelessnad.com.au/nad-treatment-for-alzheimers-and-parkinsons/