As western society skews older and resistance training becomes even more common as a means to combat the effects of aging, I wonder if more people will adopt creatine as an essential supplement? Combined with weight training, the benefits seem easily worth the relatively low costs (creatine is about as cheap as supplements get). It's very beneficial for older adults: https://pubmed.ncbi.nlm.nih.gov/21394604/
Anecdotally, both my parents are in their 70s and I've finally managed to get them to take creatine (along with regular resistance training in the gym)...the results are really incredible. Both have noticeably improved their functional strength and my mom in particular has had a bit of a transformation. A lot of women don't like creatine (water bloat is generally a much bigger drawback for women than men) but at my mom's age she doesn't care and has really taken to it.
Haven't even considered mental benefits of their training frankly but in retrospect it seems obvious as well.
If you have elderly people in your life: encourage them to take up resistance training...the benefits are undeniable. And just as a bit of lagniappe once you do that, you might also convince them to try creatine.