For occasional uses and normal transfers, Firefox send is really better. Dropbox transfer becomes useful when you want to share files that you already have in your Dropbox.
what annoys me is the password part used to be a plus feature[1]. This is why I've started to try to move things to be self-hosted. Unfortunately I've been struggling with nextcloud + my NAS due to filesystem constraints. And it's to avoid silly crap like that that we enjoyed the cloud services. Ah, what a loop!
What kind of filesystem constraints problem you run into? I've been using nextcloud on a vps using docker and resizing/moving storage used by nextcloud is quite easy on this setup (simply update the container volume config)
attempting to use nextcloudpi on a pine64 rock64 with a mounted data directory (NFS share from my NAS). The data directory must be brtfs and I can't resize down / add in a partition on my NAS software. So i'm stuck for the moment.
I'll likely use a spare 1TB USB hard drive as data dir and backup regularly, i'm unlikely to use more space than that - or otherwise just host the whole thing on AWS instead of at home.