It's also the fact that most circuits now are digital and have self test makes probing and scopes in general much less useful than they used to be.
Unless you are working in the femtoamp domain or with avalanche photo diodes, your circuit is almost certainly analogue. The voltages (or currents, as appopriate) are then
interpreted to be a digital signal. "Signal integrity" is the name given to the engineering necessary to ensure and verify that the voltage/current is correctly interpreted as a digital signal. Verifying signal integrity is usually done with analogue instruments, e.g. scopes. (In some cases it is done indirectly by measuring BER and similar.)
Once signal integrity is verified, it is best to flip to the digital domain, e.g. logic analysers or printf statements.
Hence there is still a need for analogue probing, but doing this is far more difficult (and expensive) that it used to be. Tektronix recently introduced a probe tip that, IIRC, cost $10 every time it touched a circuit!