If all the processing were on the server, this cost would be appropriately measured and monitored. Because it's on the client, and diffused over all users, it'

If all the processing were on the server, this cost would be appropriately measured and monitored. Because it's on the client, and diffused over all users, it's essentially free to the producer, and hence gets much, much worse. As a good example, I remember how Facebook became much, much slower for me post React. This then spread across the web, leading to much pain for a really large amount of users, but counterbalanced by much pleasure for developers. It's funny how that worked out.