Easily avoidable PR disaster
Given their gobsmackingly enormous market valuation lately, Apple could easily - EASILY - implement a legacy products initiative to support key items of older hardware, especially something as iconic as a Series 0 gold watch! It would maintain trust in their brand and would be good for the environment. The downside for them, of course, apart from the relatively trivial cost, is the hit to planned obsolescence, that naughty industrial policy that has always lurked so close to Apple brands (and others, of course) and is a significant driver of new sales. To do nothing and let these products slide into an avoidable demise smacks of cynicism, especially given their historic antagonism towards third-party support.
Rather than treating older products like the red-headed stepchild that has to be walled up in the east wing of the castle and forgotten about, they should be allowed to stick around as a tribute to Apple's undeniable record of innovation and design. In the vast majority of cases, they'd live alongside current products rather than delaying their rollout and enter the era of viable collectibles that still live and breath and don't just languish, dead-screened and cold in some drawer or landfill. They say that 65% of Rolls Royce cars are still on the road. Come on, Apple. Stand behind your own legacy.