I also make local backups from time to time. It hasn't been an issue for me. It takes less time for the backup to complete than the charge.

I just airdrop all my photos/videos/notes to local storage and upload encrypted bundles to backblaze so I guess to answer the GPs question the port doesn’t make much difference to me. I do make local backups but skip the photos/videos because I dislike the large single photo library bundle file it generates that has become corrupted more than once so it hasn’t taken all that long.