Old or new, manual or electric, it is and can be a problem. A good wind, at the right angle, while driving, can get inside the rolled awning material. It can then overcome the gear/ratcheting mechanism inside the roller and unroll a bit. At that point, the strength intensifies multiple fold, and can completely open and rip the awning off the side of the RV. Locking the arms against the RV does nothing to prevent it; the roller itself unrolls in the stowed position.
I have had it happen once in the past; driving at 60mph into a strong 2:00 headwind. The arms stayed in place at first until the awning unrolled about 1/4 of the way. Then it forced even the locked arms open and the awning ended up 2/3 unrolled. Luckily I got the rig stopped before it tore everything off the RV. Once stopped, we had to find cover from the wind behind a building, fully unroll then roll up the awning (not an easy task in strong winds). Everything still worked as normal, and I continued to use the awning for 12+ years, showing that nothing was "broken", the wind was just too strong (and perfectly angled).
I have not taken a single trip or owned another RV since without installing an awning lock. I prefer the one from
Camco that wraps the entire awning roller to the RV rather than the pin type that just locks the roller in one position, but they both will do the job. $30 is cheap insurance to prevent what, while rare, could be a major and expensive situation.