Heartily agree…
I also acquired a wonderful CQ 18T as an alternative to the L12.
I was disappointed to discover that overdubbing is not available within the unit itself without going to Protools.
I get that the CQ has amazing features for live work, much better than the L12. 'm not sure what’d be involved in improving the CQ recording side of the unit to make overdubbing “in the box” possible but if it were possible it’d make a lot of folks very happy indeed.