Same for phone. I don't think anyone tests their websites on older devices anymore. Many sites have become useless, because it assumes that you have a massive screen, a modern GPU and plenty of memory. There's no point in having a video as a background, or load an excessive amount of Javascript, just to show me a news feed.

No one cares anymore, and I doubt that any hardware supply bottlenecks will improve that. It's not something that anyone care to measure.