If you’re your own audience, then you can keep the joker in your head. Posting it on Lemmy broadcasts it to everyone here and that makes all of us your audience.

Because it can do something that the alternatives can’t do or because they refuse to use something more modern?

It only works as a joke when your audience knows you well enough to know it’s meant as a joke without the /s. That does not apply to you when you post on Lemmy.