Since the marketing of MMR is around Alchemy I think possibly it could be they chose 23 out of some relevance to that. But its not like 22 wouldn't make more sense as there are 22 letters in Hebrew for example , and Thummim is a Hebrew word.It’s a pretty weird number too. 22 for 2022 would kinda make sense?
But a price of 4500 usd , same as OG , could indicate that the performance hasn't been improved enough to call for a price bump?
Especially weird when you consider that an Eletech cable has also been upgraded to include Sterling Silver.