Camera bodies have pretty much become annual upgrades like phones. There's nothing wrong with the one you have, but the new one just has that "one more thing" to them.
And while feature updates like better EVFs or better video specs are a bit more frequent, they aren't yearly. Probably closer to 3 years for most brands other than Sony.
The Nikon D850, for example, has been out for over 4 years now and it's still among the best one can buy.
The image quality of phones still improves a lot every year, though they are approaching their limit.
The rest of the things are useless to 99.9% of people, so it's just a gimmick or convenience update. That's where we're at for cameras.
Phones however still see big image quality improvements, and you could take pictures that were previously impossible as they added and improved suppmentary cameras.
Reminds me of Bill Gates comment in 1981 on IBM's 640KB usable RAM limit:
> 640K is more memory than anyone will ever need