You still should, I did and can confirm it has its useful parts. I can sign in loud work locations and non-signers quite often understand me if they know some basics.

It has also already been proven to be useful with my partner. Being able to sign "I don't like it here, can we move" feels more polite than speaking it.

It has also been useful in the club. Signing "toilet" and just walking away without anyone getting confused or following me, or sign like "one beer" so you don't need to scream