13th ant 14th Debian testing and stable. By that logic, they should also have split e.g. Ubuntu in LTS (Noble), old LTS (Jammy), and the current intermediate version too.
As I've understood, Delta chat is based on the IMAP protocol and uses the infrastructure of your email provider. Thus, it uses no own server infrastructure, but has the also the downsides of the protocol and some issues with many email providers.
The meaning in terms of a singular object has evolved from the meaning in terms of a kit of objects, e.g. Feuerzeug was originally a flint stone and a fire striker, Nähzeug (sewing kit) and Sportzeug (sports equipment) are still being used in that manner. Werkzeug is a bit more tricky, as it can be the term for a singular item, e.g. a screwdriver, and a bunch of tools, e.g. all tools contained in a toolbox, while still the plural Werkzeuge exists.However, I admit, that "stuff" to me as a non native English speaker carries more the meaning of Kram (collection of items with no specific purpose) than Zeug (with some purpose).
Edit: Fahrzeug and Flugzeug were made up in the early 20th century to combat the influence of foreign languages in German, so I wouldn't interpret too much into the meaning of the parts of these composita.
The word Zäpfchen itself is the diminutive of Zapfen, a stud, peg or pin. E.g. the fruits of needle trees are also called Zapfen, Tannen-, Fichten- or Kiefernzapfen. So Gaumenzäpfchen is a small stud dangling down from the palate.
Usually, you notice it, as Mastodon automatically adds an @username@instance for everybody the commment replies to, Lemmy doesn't.