For the holidays (Patreon)
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I think a 3 channel model would be much more useful than just 3 times the usefulness of 1 channel, because it could be used as a curve tracer for 3 pin semiconductors, analyzer for 3 phase brushless motors and so much more. Just with a few extra lines of software.
With 1 channel it already is extremely useful. Precision power supply, component tester, automatic multi-chemistry battery charger and discharger, power waveform generator (would that be useful for something? :), you name it.
Would something like that be interesting? I like the idea a lot, so I'll keep it a little bit secret for now ...