Yes, but the decimal time system actually had reasonably long seconds, they were 0.864 seconds long by our way of counting. Most people count slightly faster than 1 count per second (hence the old one thousand and- counting trick), so having shorter seconds would probably be good for counting.
I don't know how well we would adjust to having only 10 hours in a day, though. That would make business hours only about 4 hours long, which would make it impossible to schedule many appointments at precise hour or half-hour times.
I'm also no too sure about having 10 months in a year, especially in cultures that recognize four seasons.