Relevant in what way? Relevant as in they are factual or relevant to the day to day of a real PHP developer, because I can tell you the latter didn't hold up even when this was written.
> even a decade has passed
We got more optional typing and better error handling, and I'm still able to run the awful code I have written a decade ago.
Java is an almost 30 year old language and I can still do this:
String foo = null; System.out.println("hello" + foo.length());
> Make you wonder what the hell php devs are really doing?
Incrementally improving the language without breaking too much.
> 60% true still. Most of the issues are in "wontfix" mode.
Most of those are quirks that you can safely ignore, and "fixing" them would result in breaking a lot of the existing code, which is not worth it.