A 12-bit ADC has a theoretical maximum of dynamic range like 72 dB. This would be somewhere S9+10dB to S9+20dB above the noise if you have no too much QRN around, but implementations are different. Radios today mostly have only whole ham bands wide frontend filters, also a usual antenna do not change too much on the unattenuated bandwith of signals going to the ADC. You can say that the typical radios 40 years ago had about the same narrow dynamic range, no more than this 70 dB's and we could use them everyday, but sooner or later everybody must learn that overloading an ADC is really different from overloading an analog radio even if they have the same numerical value of dynamics. ADC's have a very different IM curve from the analog stages: they maintain their really good parameters (you can't even calculate IP3) until the sum of the power of signals they are getting exceeds the maximum input power, but if you cross the line... a lot of problems begin to happen. Have you heard what an overloaded sound card abruptly produces? Problems are not limited to getting a weak station wiped out by a nearby strong one. It is enough to have one "too strong" station, e.g. over that S9+20dB power (dBm value the ADC gets) anywhere in the band to overload the ADC, or ten of a bit less strong ones, etc..., and you can't do anything against it - except to attenuate all the signals on the input. So, you need reserve... It is sure that there are conditions where the modest SDR receives stations well but stating (even aggressively!) that the big difference in parameters does not mean, and making up a virtual reality where Hermes Lite (!) 2 only differs from a higher spec. SDR in the owners' fear of their self-integrity and some meaningless numbers is pure ignorance and lack of knowledge. It is sure that there are conditions where the modest SDR receives stations well, they are not broken just limited, but we don't need such "nothing to envy" claptraps here, this is intended to be a technical forum. I hope I'm corrected too if my numbers are bad.