Change your config files? There are setting there for which files you allow.

Change your config files? There are setting there for which files you allow.

Was in 3.x, I think. Is still in 5.x?

I'm not aware than any config changed in that regard.

allowedfileuploads

application/config/config-defaults.php

Ah, OK. This is still there, and

$config['allowedfileuploads'] = [''];

seems to allow the user to allow any file type he/she wants to enable (but actually do not). But still there is no way to allow uploading whatever, without before information about files that could be uploaded.

Not sure I'd prefer such a feature to exist... It's good to be explicit.

Of course, but let's say you collect short videos with Lime. You have added .mp4 and some other formats to allowed types. Then Apple invents a new format and participants will wonder what happened.

(Slightly related: extension vs. mime-type is not so clear. To accept very old .doc-files containing plain text you must add .txt to the list of allowed types.)