Syncthing version 1.x will soon be replaced by Syncthing version 2.x. Version 2 brings a new database format and various cleanups, but remains protocol compatible with Syncthing 1.
More detailed information about Syncthing 2 can be found in the release notes at https://github.com/syncthing/syncthing/releases.
This release is also available as:
APT repository: https://apt.syncthing.net/
Docker image: docker.io/syncthing/syncthing:{{.version}} or ghcr.io/syncthing/syncthing:{{.version}}
({docker,ghcr}.io/syncthing/syncthing:1 to follow just the major version)