There is simply no pc equivalent for local ai inference performance, foot print, plug-and-play and power consumption.
Waiting is risky. Two things might happen is M5 is announced: Looooong lead time + price hike
Performance difference between M4 and M5 is small. Even if you buy an M4 Max, demand on used market is so high that you would be able to resell it at retail price should you want to upgrade to an M5. Even M2 Ultra with super high bandwith and reselling for strong money.
Demand for Mac Mini and Studio is going to grow. Anthropic, OpenAI and other applications have stopped subsidising ai inference. They are changing from fixed price all you can eat, to API pricing. This means that for many people including myself it’s cheaper to buy a 48-128GB Mac Mini than pay OpenAi and anthropic $500-2000 per month in inference costs for coding.
For my business, I will likely buy 5-10 Mac Minis this year.