I have excellent automation that does scalping, been scalping over 25 years, half of my time manually. Am just getting at an age where average per trade seems to go lower every year, much tougher to get all my orders filled. First it was the E-Minis watering down size of the ticks and now Micro watering it down even more, next time it be Mini Micros at 4 cents a point.
Long ago I added scalping so as to have something coming in, but I have learned how to trade options and let them waste away.
Couple scalping systems will continue, but overall have shifted funds that pay much more per average trade.