I think so, writing a punctuation dot is faster than handwriting a character e. The o can be an o I suppose so.
I have never exercised short hand, look for Gregg on you tube, Present day computers write what you say, as I understand, when my great greatgrandson drives me to the MD, he using his voice operated navigator.
I exercise Morse code listening on ear by head copy, typing afterwards what I heard for checking. Hope to prevent dementia and compulsory leaving my home.
You will have to know short-hand already - same as touch typing - if you know it there is no reason not to use it
I understand being grumpy helps stave off decline (maybe that's just in the UK), but I guess some exercise and eat your greens is necessary also