i think most here if not all, people complaining by predatory practices of not supporting or liberating your device to whatever you want, are not worried or effected by monetary reasons

for my smartphone usage, i could still use my iphone se (1° gen) perfectly fine and that would include writing some pieces with garageband; which got deprecated and non-download-able because newer versions weren't aimed to my iOS version. heck the vast majority of smartphones aren't compilling software with local hardware (nor i know why someone would do)... guess we could stop with processing power advancement of 2015 just fine to run Whataspp and Instagram. producing hardware is costly, not everyone has a decent job nor minerals are infinite and have no ecological impact

You will also need to accommodate the banking apps updates, banks will not support very old versions of their apps( very old varies but probably about a few months ). Beyond that the new versions may require hardware support that may not be available in a decade old phone.