Senior Judge Silberman of the DC Court of Appeals is having none of your alphabet-soup acronyms:
"The Agency and thereby the parties regularly use the acronym “ILEC” for Incumbent Local Exchange Carriers, and “CLEC” for Competitive Local Exchange Carriers, but we prefer the use of the English language and deplore the practice of using acronyms unknown to the general public. Thus, we use “incumbents” to refer to what the parties call “ILECs,” and “insurgents” to refer to what the parties call “CLECs.”"
I cannot tell you how happy this makes me. I find few things more repellent than looking down-page upon forests of menacing, unpronounceable non-words. So do judges. That is a feeling in your readers you want to avoid at all costs.
Comptel v. Fed. Commc'ns Comm'n, No. 19-1164, at *3 n.1 (D.C. Cir. Nov. 3, 2020).