That depends on the profession I think. If you are designing A/D or D/A converters, you know sampling and all the artefacts by heart. Nyquist criterion is extre

That depends on the profession I think. If you are designing A/D or D/A converters, you know sampling and all the artefacts by heart. Nyquist criterion is extremely important, but it is simplistic. You need to consider a lot of other stuff like out-of-band noise and harmonics, reconstruction filters etc etc. We have periodic steady state analysis to simulate sampled systems and harmonic transfer functions by the way. It is extremely useful especially to stimulate noise aliasing.