I have never owned an Apple product that didn't slowly get worse over time. After a couple iPads and MacBooks, I'm almost certain they are intentionally updating their operating system to slow down older products. Even worse is the removal of access to certain applications for older hardware in the name of security or compatibility.
Meanwhile my Linux laptop continues to get faster every year as the operating system improves with performance updates and bugfixes.
Absolutely agree - happened on MBP, 2 generations of iPads, and Watch...For iPads and Watch, I thought that it might just be the famous battery health vs performance tradeoff they enforce on us, but I rarely ever used the MBP on battery, it was plugged in 95% of the time.
This may be true (not perceptible w/ my apple silicon Macs), but the important thing is that they get slower more slowly than my wintel gets slower (I blame disgruntled Windows and/or nvidia drivers devs....)
My Apple ][+ improved with age as I added things like 48K of RAM, a floppy disk, a language card, etc...
The only Apple products that I can think of that haven't degraded in quality over time are the iPods and maybe the Apple Watch.