Probably because they shoved Z-transforms down your throat instead of focusing on the concepts. Filtering, correlation, convolution, are easier to understand i

Probably because they shoved Z-transforms down your throat instead of focusing on the concepts. Filtering, correlation, convolution, are easier to understand in the discrete domain. It's a shame DSP is not taught prior to classical signals & systems courses. Instead it's taught as an extension to analog signal processing, at least in EE school.