Which seems to be nodebb's approach in general w.r.t. stuff like this
In general, yes. We try to not muck around with existing installs too much, but plugins are a little more fast and loose with things like this. Will keep it in mind 😄
As the title, are there any plugin that allow us to upload any file type such as docx, txt ... ?
You should be able to do this by enabling
Allow users to upload regular files in the ACP, and leaving the allowed extension list empty, or just putting in the extensions you want to allow.
I hope that you do realise that allowing all file extensions is rather dangerous without extra precautions.
Leaving the allowed extensions list empty is something I would strongly advise against.
thank you so much