I think units are brilliant, and use them extensively in math and programming. However I often get sloppy and conflate conversion factors (60 minutes per hour)

I think units are brilliant, and use them extensively in math and programming. However I often get sloppy and conflate conversion factors (60 minutes per hour) and quantities (44100 samples per second). This usually isn't a problem, as long as I use different units for sampling rates (samples per second) and waveform frequencies (cycles per second) instead of calling them both hertz. But things get messy when you're converting between multiple different sampling rates, polyphase resamplers ("64 subsamples per sample" etc.), overlap-add convolution (which has like 3 different quantities all labeled "samples"), and such.