Currently I'm syncing to a s3 bucket with e2e encryption but of course you could sync to a server you setup yourself including a basic windows box.
I've been using it for a little over 3 years and it serves all my note-taking/storage needs, especially with the relatively recent addition of extensions/add-ons. I have had no issues syncing through either dropbox or Nextcloud.
Currently I'm syncing to a s3 bucket with e2e encryption but of course you could sync to a server you setup yourself including a basic windows box.