SSE vs WebSockets vs Polling

This article: "Using SSE Instead Of WebSockets For Unidirectional Data Flow Over HTTP/2" explores the differences between 3 approaches for FE to BE communication. It is from a past where SSE was going to take over other methods for streaming. Nowadays things are different. SSE wasn't picked by the developers -> it just wasn't needed as is. People who needed streaming didn't need a pre-defined text based protocol. Everybody wanted their own thing.