This quote really sums up the situation:

This is a technical and business challenge, but also an ethical crisis. Anyone who cares to look can see the tragic consequences for those who most need the help technology can offer. Meanwhile, the lies, half-truths, and excuses made by frontend's influencer class are in defence of these approaches are, if anything, getting worse.

Through no action of their own, frontend developers have been blessed with more compute and bandwidth every year. Instead of converting that bounty into delightful experiences and positive business results, the dominant culture of frontend has leant into self-aggrandising narratives that venerate failure as success. The result is a web that increasingly punishes the poor for their bad luck while paying developers huge salaries to deliver business-undermining results.

The developer community really needs to be building websites that work on all devices and connections, and not just for those who can afford the latest technology and high-speed internet connections.