I’m not aware of an SFTP client that works like the cloud drive connectors. Do you know of one that monitors local files/dirs for changes and automatically sends them? Or polls the server for changes and downloads then (if they’re on the allow list)? Keeps versions?

If literally all you’re doing is occasional file transfers, sure, SFTP is easy. That’s not how most people use cloud drive clients.

For me and my group, Nextcloud works fine and fast. We do more than file sync and share.