> I also miss Filerun's "Request a file" feature which worked very nicely if you just wanted someone to upload a file to you and then be done.

With the disclaimer that I've never used Filerun, I think this can be replicated with copyparty by means of the "shares" feature (--shr). That way, you can create a temporary link for other people to upload to, without granting access to browse or download existing files. It works like this: https://a.ocv.me/pub/demo/#gf-bb96d8ba&t=13:44