TIL:

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Are there more of these, what is this magic!

It's a "text fragment"; started as a Chrome thing, other browsers are slowly adding support.

https://developer.mozilla.org/en-US/docs/Web/Text_fragments

At least he was totally right about Java not being a hacker language.

So, what actually makes Java successful despite all of these?

2 things (in the corporate world): Android and Spring framework. It's also basically OOP the language which means large enterprises are biased towards it.

Other factors are that it has very strong built-in libraries and has become a popular choice for "how to program" classes so lots of people are familiar with it. Having a similar name to JavaScript (the web's native language) also helps.

These are reasons for why an individual hacker might not take to a language. They don't factor in to a large organisation's choice of language. And to be honest, quite a few of these arguments would apply to Javascript as well.