Not just the hardware. I far prefer icons from that time as well. I hate the modern trend of flat icons with no details. They look like someone mashed them out after 5 minutes in Krita and then drugged their management into believing that it was a recreation of the Mona Lisa.
Early iOs and Android icons were one of the last offshoot of the style called "Frutiger Aero"
Flat icons don't necessarily bad and undetailed, it's just harder to create something more recogniseable with less tools, but I actually like the order, that they look like they are related to each other. Back in the day I created icon packs for the programs I used on pc, so my desktop would look clean and uniform.
Design styles are in a cycle, just wait some years and they will show up again, I'm sure. There is already some connection with the new style of windows 11.
The modern flat icons are actually… A little insidious in their conception. They're based on industrial psychology and mid-century modern propaganda. They make your phone just that bit more addictive. It's not someone convincing management it's a recreation of the Mona Lisa, it's management coming down to the graphics department and saying “You need to make it more addictive”