Our industry is overflowing with acronyms—looking at you, marketing—and at this point, I don’t even know how we manage to understand each other anymore.
Sure, they save some time but overusing them is just passe. It’s not in good taste.
When you’re talking to a colleague, that’s actually OK as there’s virtually no risk of miscommunication. But when you’re talking to people outside of your domain of expertise it’s good to tone it down, and just use normal words. They will be able to feel better because they won’t have to look them up or keep asking you to clarify, and you will actually have a better chance of getting your point across.