Why are developers still using proprietary third-party libraries? [closed]

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As the open source world is fairly advanced now and you can find an open source implementation of pretty much everything, why are people/developers still using the obscure/proprietary libraries? In what case these are absolutely needed?

Answer 1

Three obvious reasons:

1. There's no open source equivalent,
2. The company wants paid-for support that they can rely on.
3. They are a bit behind the times and do not yet trust open source libraries.