Websockets are nice, but don't really fit into PHP's architecture around short lived requests. Sure, for most parts PHP can handle that, but for long running t

Websockets are nice, but don't really fit into PHP's architecture around short lived requests. Sure, for most parts PHP can handle that, but for long running things some I/O event based context switching typically is more efficient and in a few error cases PHP deferrs cleanup to "request shutdown" which might be a while out with websockets. In the end PHP is focussed on one role (serving "normal" HTTP requests in isolated contexts quickly) and other technologies do other things better. And I think focus is a good thing. Then again: PHP is open and does whatever the contributors want it to do and I myself am not actively contributing much anymore :)