Compare mobile phones to PC today, you will find that a PC made like five or more years ago can run the latest software without issues while for mobile devices,

Compare mobile phones to PC today, you will find that a PC made like five or more years ago can run the latest software without issues while for mobile devices, they can hardly survive for more than three years (I guess?) since the ability to support a new Android version completely depends on the SoC manufacturer. You may also upgrade part of the hardware of PC or install whatever OS you like on them if you want to. However, look at those "smart" phones, which are not smart at all: you are limited to a few Android versions and you are forced to install all these proprietary userspace drivers (HALs for example). Moreover, if you want to have full access to your device (Root), you have to bag the vendor for that privilege (Xiaomi, Huawei, etc. OnePlus is way better), which should be the right for everyone. This is because the PC market is standardized (I guess, correct me if I'm wrong), compared to the phone market which has all of these proprietary blobs, private interfaces and lockdown. I hope we could have open source drivers, standardized hardware and software interfaces (like UEFI) for mobile smart devices just as PC does. Thus we can install whatever operating system or software without limitations. Also there will be less e-waste just as PC.