After 10+ years of training, I think it's time...

^ I can only assume that you wear that at ALL times.

^ Personally, I do.

Surprised it took you so long.

Surprised everyone doesn't wear one.

Cheapest dental insurance available.

Also keeps your lips off your teeth when being face choked.

Also keeps you from hyperventilating.

Also keeps your neck a bit safer.

And so on.

No reason not to use one. Several reasons to use one.