People don't throw away hardware just because the software stopped getting updates. Although not recommended, there's even people still using Windows 7.
I tried to give away my old laptop to a charity. They wouldn't take anything more than four years old, and nothing that wasn't running windows 10. Anyone want a free laptop? I've got one sitting in the closet that I cannot seem to give away.
And AI's are destructive for the environment why? Is it more environmentally friendly to waste a lot more human time with less compute power doing mundane repetitive shit for hours that an AI/LLM can summarize or answer in seconds?
With that logic it's also more environmentally friendly to use an ox to plow the fields instead of a diesel John Deer.