AC only rms, AC+DC rms and DC only. Add in viewing AC only rms and DC only at the same time as a bonus. In many troubleshooting situations these are the measurements that really help.

Based on the above comment the mooshi would never be able to display ripple or DC offset. Huge limitations. Even the most basic non-rms meter would give me some clue if a DC supply had ripple. I also expect a reasonable response to to a failing triad that is outputting half wave rectified DC.

Another huge cleanup would be being able to graph just one channel at a time. Voltage or Current or Power…