It depends on what level you think is important. It’s all contributing to user experience at the end of the day. Whether you stop at making your site load fast.

It depends on what level you think is important. It’s all contributing to user experience at the end of the day. Whether you stop at making your site load fast. Run at 60fps. Or make sure that the user is able to do more than run your website with their machine. Web in particular as an ‘OS’ sitting on top of an actual OS often gets it in the neck for being a resource hog and it’s not just the browser teams at fault there. The underlying assumption of do whatever, things are good enough and we have enormous amounts of processor power doesn’t help. I’d argue that if we’re truely making software for people it should have as small an impact on their machines as possible. Or how much energy would we save globally if our code in data centres was more efficient?