SAUCE has proven quite resilient and adaptable. I don't think it really works for describing newer developments like like Utf-8, 256 color or RGB ANSI art. It maybe misses some vintage platforms like ATASCII. But that could change with a format update. For MS-DOS and Amiga ANSI art packs, and some nicher formats like Xbin, it's pretty standard.

XBIN files have been scattered around artscene packs since the 90s, but since it is directly tied to VGA hardware, it remains niche. Some people really like it. I have always found it tricky to work with.

I like to think the DUR (durdraw) format can be adopted or extended to describe most text art, though custom font support like Xbin is not in the current version. I also like to think that DUR's JSON core makes it easier for mortals and programmers to play with than SAUCE's dense binary format (and ANSI escape codes, even), but that's a bit subjective.