Earlier quoted context omitted.
true. But Java 2023 is quite different from Java1. The tools you use now are different (unless vi) You have had to learn a lot of new technologies, frameworks, syntax to keep up. PHP has also gone through so many changes that it is near a different beast these days than when it first appeared. So if you had relied on your skills you learn as PHP 1.0 and Java 1.0 today you would not be very productive.
Much/most of Java 1 will still compile, at least (FWIR). The evolutionary progress of java 1... to whatever it is now (current one I'm using is 17, but I know there's more past that) has largely been adding of new libraries/methods, etc, and the majority of your java skills from 10-15 years ago are still valid (although might not be the most efficient any more). I've watched people go through Flash/Silverlight/Action…
Actually it won't, past Java 9, as after the modules introduction it was also decided to take action on deprecation, now things get really removed after a couple of releases.