In what way do you think this is useful over parentheses?
a * . b + c . + d * e
do?So may be most useful if you don't have inherent precedence, as might be the case if you're not dealing with the standard math operators.
Alternatively, one might say the dots override inherent precedence. So
a *. b*c+d*e
means a * (b*c+d*e)
with the inherent precedence disambiguating the right operand of *.