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PHP kept on getting professional attention and development, and so now it also has all those things you mentioned.

Yes, but also Wordpress still exists and keeps the old ways of doing things.

Saying that a certain project exists that does not use newer features of a language does not detract from the fact that the language itself is much more featureful.

Im sure I could find popular projects in every language in the world which only uses old library functions and hasnt been updated. I would hazzard a guess that as node changes so frequently, there are untold amounts of projects still using old inefficient methods compared to what is available in the latest version

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