Version 1.27.3 is available upstream. Please consider updating! It seems that version 1.27.3 is available upstream, while the latest version in the Gentoo tree is 1.27.2. You think this warning is false? Read more about it here.
Syncthing replaces proprietary sync and cloud services with something open, trustworthy and decentralized.
Your data is your data alone and you deserve to choose where it is stored, if it is shared with some third party and how it's transmitted over the Internet.