mkgus OP
Yes, digital only exists as a mathematical concept. All of reality is analog (at least the reality we deal with - at the scale of Planck time and Planck lengths things may be different). A stream of “digital” data is an analog signal that a computer has to interpret as a 1 or a 0 by deciding when the value has changed enough and at what time to be interpreted as a different bit.
>>>>No, actually reality is more like digital. At the quantum level, which is really where the rubber meets the road let me remind you, gentle readers, that everything can be described by its quantum state; electrons have certain quantum states and require a certain amount of energy to get to the next level/orbit. That is more like Digital than Analog, I.e., having non-continuous states. In an analog world the electrons would not have non-continuous orbits. Light also is described by quantum states. To whit,
“The photon model accounts for anomalous observations, including the properties of black-body radiation, that others (notably Max Planck) had tried to explain using semiclassical models. In that model, light is described by Maxwell’s equations, but material objects emit and absorb light in quantized amounts (i.e., they change energy only by certain particular discrete amounts). Although these semiclassical models contributed to the development of quantum mechanics, many further experiments[3][4] beginning with the phenomenon of Compton scattering of single photons by electrons, validated Einstein’s hypothesis that light itself is quantized.[5]”