The most environmentally friendly computer is the one you already own, it’s sad that Apple forcefully obsolesces still working computers by dropping support for them from new releases of MacOS. Unfortunately the whole ecosystem is geared towards users being on the latest OS version, so third party software also becomes quickly unsupported.

Realistically most computers made in the last 5-7 years have enough processing power to last until broken for the most typical office / web browsing / editing vacation pictures tasks, so as much as everybody likes new shiny things, it would be great if it was possible for the more environmentally conscious consumers to be able to keep using their computers without being exposed to security issues.

I’d rather pay Apple $200/year for new versions of MacOS than be in the current “your hardware is a time limited dongle for MacOS” situation.