Comment Because the differences matter less... (Score 4, Informative) 83
I got a desktop computer in 1995. It had a 686 Cyrix at 166MHz, 16MB of RAM, an 8x CD-ROM, 1.6 GB hard disk...and it was one of the fastest computers in my circle. By 2001, it was unusable. USB was on its way to replacing serial and parallel peripherals, which Windows 95 didn't support. 166MHz was slow, compared to the 600MHz P3's that were available (and a year later, they'd hit 1GHz). 48MB of RAM was nothing (64MB was common, 256MB was available), and while 1.6GB was a bottomless pit when Word documents was all I was creating, and 50MB installations for video games were considered pigs, 10GB drives were available...and needed for the CDs I was ripping into MP3s. Six years of computer progress was clear, obvious, palpable, and using the old computer had a clear feeling of constraint.
Today, unless you're doing local AI, 8K video rendering, or a handful of other niche applications, a 6-year-old computer will be perfectly usable. Six years ago, SSDs were already the default, 6-core CPUs were the default, and it was right at the cusp of when 16GB became mainstream. A six year old computer is perfectly usable for most tasks. It runs current iterations of OSes (admittedly a 6-year-old Mac might not because of the OSX shelf life on Intel), it *might* need a RAM upgrade, and it *might* benefit from a newer SSD to some extent...but while a 6-year difference was night-and-day in 2000, it's turned into "meet the new boss, same as the old boss".
And, so too it is with phones. The difference between the iPhone 4 and iPhone 8 was readily understood and appreciated by most users; the storage capacity increases, camera improvements, FaceID implementation, Apple Wallet/NFC, bidirectional lightning cable, and screen size increase were all understood, palpable, and basically sold themselves. I went through the Wikipedia page to get a feel for what changed between the 13 and the 17...and the answers were the satellite connectivity (that may-or-may-not-work depending on carrier), Apple Intelligence (that they famously are still trying to get off the ground), the dynamic island, a few more camera improvements, and colors...oh, and they are more expensive now.
Samsung is kinda the same deal; the foldable phones are nifty, but at $2,000, one can get a phone, a laptop, *and* a tablet for the same price...and the difference between an S21 and an S25 is similarly uninspiring for a $1,000 upgrade.
So yeah, phones have gotten "good enough" for most people, they've been that way for a while, despite the price tags more frequently involving commas. So...yeah...makes perfect sense that with more money expected for less improvement...that 3-year-old phones are the norm now.