I expect plenty of Bitcoin developers have moved on to set up other coins when they see better technology options. Bitcoin is brilliant technology, but I wonder if the founders foresaw the impact it would have in resources before it's even become an everyday thing for most people. It just cannot carry on as it is now.
I should mention that the article is not about Bitcoin as that is not viable on GPUs and uses dedicated hardware. That still needs replacing regularly.
At the very least we should be harvesting heat from mining rigs to warm homes or generate power.