It's a fine distinction. Certainly the dealers were expecting to be able to supply the 818v3 in March, presumably because M gave them this steer. I think alleging that M has been unethical is unfair - that implies some gain at the customer's expense on M's part (or by the dealer). I've had one "on order" since March but at no point has anyone asked for a deposit. If you paid a deposit then I think you have a case against your dealer. In M's case it's rarely the conspiracy theory that applies and nearly always the other alternative.

Streaming: Roon, NUC, QNAP869 NAS
2ch system: dCS Vivaldi, Audionet Stern, Audionet Heisenberg, Magico Q1
Retro system: 101/104/105, Red Rose Spirit