I haven't even bought a 5G phone yet. My carrier keeps threatening to cut 4G coverage in various areas, and has already axed 3G entirely, rendering large swathes of otherwise perfectly functional devices useless. So far my 4G Moto Z still works. For now.
At this point my conspiracy opinion that the constant "generation" changes are mostly to just force people to buy/lease new phones and devices. Even pokey old 4G has always been more than fast enough for all of my mobile internet activities. Hell, even 3G was.
I have no less than four otherwise flawlessly functional phones in a desk drawer that just won't work with my cell carrier because they've either turned off 3G or discontinued the specific 4G bands those devices need.
I live in a medium size city with extensive Verizon coverage. 5g here is still dogshit. It's always slower than LTE and even though towers are everywhere, my phone is constantly switching back and forth.
On T-Mobile shitty 5g is just called 5g in the top next to your signal strength. The mmwave 5g is called 5g uc. Every carrier does something different.
It's still a small number of users no matter how many use cases you list. There are newer Kindles and newer cars. 3g being turned off is inevitable no matter how many old devices are in existence.
I totally agree with you that generation changes are either currently or going to be used as a form of planned obsolescence. I reckon that within 10 years or so we’ll have sub generation types (things 6.5G) that will force people to buy new devices.
I was forced to upgrade since i was still rocking a 3g phone and my area switched to 5g. The phone company gave me a free Pixel6 since it wasnt my choice to upgrade. Maybe if you hold out long enough you'll just get a free upgrade. Though it was a double edge sword, since they tried to up my monthly bill since i was "upgraded" to "premium data". I had to fight that and still ended up paying a few bucks more than previously, but better than what they tried to charge me.
As a person living in a densely populated city of London, I don't want 6G, I need 10G and I need it yesterday. There's no conspiracy, there's an obvious and objective reality.