> Unlike the rest of the technologies, [Websockets] seems to have somewhat of a purpose — even if it’s been made redundant by things like HTTP/2 streams. ... Give it a few months, and there will be some NodeJS fad where everyone wants to re-implement HTTP with WebSockets, and load every asset for their website through JavaScript to save a tenth of a microsecond in some edge case involving tech buzzword bingo. ... Once this happens, disabling WebSockets breaks the internet.

To be fair to Websockets, they've been around for almost a decade, pre-dating http/2 by a few years, and the duplex communication they offer is a fundamental building block for all kinds of stuff, from games to trading websites to chat systems.

Although the Battery API is a different story, the author's point about Websockets seems to be based on somehow having overlooked them for quite a while.