Some 16 year old digital cameras keep on going. Leicas, not sure, I own only a 70+ year old Barnack, almost as old as me and it's still doing okay - as I am, but when something inside me fails it won't be a camera repair shop job.
I had a Canon 450D kit, my first digital - a gift in 2008 or 2009 from my SO, who bought it dirty-cheaply from a work colleague who didn't care for it. I recall he paid AUD $1300 for the (two lens) kit. I bought it for half that, and I thought I had a real bargain.
I soon learned otherwise. For everyday snaps it was adequate, but I didn't like the colors, I had to do too much post processing to get those right for me. Ditto the mid-tones. White cat fur came out blue or green and no amount of in-camera adjusting ever fixed this. Friends who had similar Canons all complained of the same problems, so mine weren't unique.
To my dismay I found I was getting better results with a dead-meter Nikkormat and a Weston Master. Quite a sobering revelation when everybody and their cat had a digisomethingorother.
The crunch came when a stock photo buyer I sent a shipload of D450 images to (at the client's request), rejected them all, saying the colors and the mid-tones were "unsuitable" for reproduction.
Many I know love Canons and do good photography with them. So maybe I just had a crap shooter. Anyway, I sold the thing at a loss and bought the D90 which we still have. Never regretted this decision.
That D90 now has 130,000 clicks on it and is still going. Last week we were gifted another D90, with a whoppingly low 4,000 on its snapmeter. So we are now set up for at least nine lives (thanks, cats!).
It takes all kinds to make a village, so the old saying goes. Ditto to make a camera. For me Nikon is that camera (with Fuji a close second).