How come smaller companies like Zyxel and Asus have solved this problem decades ago? Maybe because they support their hardware for years after they stopped producing, so the stock clears?
It's one thing to leave some obscure issue unpatched in a functional product, but to leave a product non-functional is such vandalism that I will avoid them like the plague.
But yes, every time i bought one of their products i had 5 years of updates, and by that time it was out of retail for years.
They don't have advertising-monopoly waterfalls of money, which affords them an attention span for things other than the care and feeding of the advertising monopoly.