It’s used in English, which as far as I’m aware isn’t dead.
If any word deserves a character, it’s “the.”
There are a bunch of old handwritten abbreviations that have fallen out of use probably due to typewriter/computer limitations.
But ðis might be because I have Danish as well as English installed, at at least Ð is required for Faroese names.
> In screenplays, two authors joined with & collaborated on the script, while two authors joined with and worked on the script at different times and may not have consulted each other at all.
I sometimes use it to avoid awkwardness in lists, e.g. "I ate fish & chips and drank a cup of tea".
I guess both examples use & as a stronger binder than and.