That advice is so good that people are already working on it... even in the past! Believe it or not, there is no plot for using outdated technology and keeping

That advice is so good that people are already working on it... even in the past! Believe it or not, there is no plot for using outdated technology and keeping the prices high. This is a quite competitive market, and engineers working in the field are not stupid. There are already some machines using GPUs for the signal processing. I think there might also be some machines with ADC in the probe, although this is not simple (you also have to put the transmit side, and the rx side has to be of good quality) and you can really benefit from extremely high acquisition rates, so depending on what you want to do such a digital link is not trivial + plus you basically duplicate a large part of the machine in each probe if you do that, so I'm not even sure this will be better in every cases... Also; a new machine can take several years to design and bring on the market.