> Yes, there is more memory available than before, but that doesn't mean we should just waste it for useless stuff.
I disagree. I think the point is that it's not useless, by its own existence. It saves dev time (which allows more - and better! - programs to be built), it allows richer features and interactions, it lowers the barrier to entry for maintenance work, and most of all prevents constant re-inventing/implementing the wheel, which is reflected to the user in a lack of many common types of bugs, annoyances, and accessibility issues.
I disagree. I think the point is that it's not useless, by its own existence. It saves dev time (which allows more - and better! - programs to be built), it allows richer features and interactions, it lowers the barrier to entry for maintenance work, and most of all prevents constant re-inventing/implementing the wheel, which is reflected to the user in a lack of many common types of bugs, annoyances, and accessibility issues.