We need to expand the TLA space.

The only options I can think of are increasIng the number of letters and redefining “T” to “tetra” or even “thirty”.

Time to get started on a new RFC

ETLAs got you covered:

https://wiki.c2.com/?ExtendedThreeLetterAcronym

Although I'd like to see something like XTLAs, for eXtensible Three Letter Acronyms.

You can never have too many The Last Airbender spinoffs.

I guess I'm still not getting TLA, since my Temporal Logic of Actions model says there should only be 17 valid spinoff states.

Have you checked out the Unicode character repertoire recently? There are a lot more than 26 letters to play with.

We have to restrict outprselves to phonetic alphabets, abjads, and abugidas else they can’t truly be “acronyms”

Perhaps consider a FLAX?

Four letter acronym, experimental.

That will only work until the RFC is approved, at which time the X will be dropped.