Yesterday, I faced an issue sending a PDF file through my NextCloud provider. I don't like to self-host something so critical because it has my contacts, calendar, and files. Unfortunately, my cloud host provider runs version 18 whereas it appears to be fixed in version 19.
Previously, I had used Firefox Send for this but it had been shut down temporarily due to concerns around malware being sent using the service. I asked the Fosstodon community for an alternative as I was unhappy not being able to password-protect or set an expiration date on WeTransfer or Dropbox.
Very quickly, I discovered Lufi. I like the user-experience as tried on a public instance, and will self host it for sure. Even more so now that Firefox Send has been officially shut down, as many in the privacy community predicted would happen.