The article advocates that the client pulls data via polling (as I understand it), ignoring over a decade of precedence for using websockets for pushing data to

The article advocates that the client pulls data via polling (as I understand it), ignoring over a decade of precedence for using websockets for pushing data to a client or broadcasting it to many clients. It's up to the clients to consume that data and react to it if they even want to. There's nothing particularly bad about pub/sub there. It also talks about a 'command pattern' at that point, which sounds like they're complaining about RPC really.