Proposed new feature or change:

Convolution is said to be often seen in signal processing. It would be nice that this function provides an "out parameter" as the ufunc functions do. Convolve operation does not really operate in an element-by-element fashion but when we are used to 'abuse' of the "out parameter' for array operations in loops (mainly to avoid unnecessary memory management), this is annoying to not be able to write similar code for the convolve operation.