Marketing trust for EEG devices from OpenBCI made in China for 230 USD up to g.tec medical multi-purpose devices for 50 000 USD?

Since years Peter Gamma from www.petergamma.org reviews about low-cost high-quality EEG devices. But what happened? g.tec publishes YouTube videos about their 50 000 USD heatset: And Robert Oostenveld writes OpenBCI Cyton is bad, we should by the Unicorn Black by g.tec instead. But Robert could not convince us personally. Since who buys from mBrainTrain anyway? …