What do you think "most certainly matters"?
Anything that effects the SI.
Precisely. SI is an analogue phenomenon not digital, and the same issues also occur in analogue circuits.
As I stated, it just provides context which I thought would have been obvious. Sure we can become pendant but it doesn't add anything to the discussion.
The key distinction between digital signals (0,1,etc) and analogue signals (volts, amps, frequency, etc) is not pedantry.
False distinctions between analogue waveforms and RF/microwave etc is not pedantry.
Failing to grok those is the source of much bafflement, many incorrect statements (especially w.r.t. sampling rate), and many problems seen all too often in circuits (especially SI).
Hence it is important, not mere pedantry.
When you consider details, digital is analog. I use the term digital to provide context about what we are probing. Again not 0's and 1's but loading, drive strengths, transition levels, overshooot.... As you previously posted: Strictly speaking it doesn't matter. If you are looking at a waveform with a scope you are looking at an analogue waveform that something will interpret as a digital signal.
Much like my own post so far, I suspect these comments are too high level and obvious. They add little to no value to the discussion.
Lewis Carroll referred humourously to similar issues 170 years ago, via his Humpty Dumpty character
The drive strength at the far (rx) end of a 50/100/etc ohm transmission line is the same whatever is at the near (tx) end.
Digits are captured in digital tools such as logic analysers, or protocol analysers, or printf() statements. Scopes capture, ahem, analogues.
A key principal is to use an (analogue) scope to observe (analogue) signal integrity, then flip to using a digital tool to observe digital signals. But you know that.
If beginners were taught that and understood it, fewer questions would need to arise - because they sorted out many problems on their own. Their remaining questions would be more interesting and less repetitive
That's why I think it is important.
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