It’s likely wrong reporting, the m5 ultra gets 614 GB/s today. The m3 pro gets over 800. The rumored m5 pro is 1.2TB/s. Likely this will be 2.4 TB/s, but half the reason for high bandwidth in nvidia chips is somewhat offset in the unified scheme. Mlx needs a lot less copy data around when the gpu can just read it directly.

Something got reported on incorrectly because the M5 Max's have 614 GB/s today, and the Ultra M4 machine's (not laptops) are 819 and that's 3 generations behind a M7 if they make an M7 ultra machine.

$ for $ you'll get more video ram than paying for a 5090, but it won't be as fast and can't train well.

Before the ram price decable, you could get a 192gb M4 Ultra for ~10k CAD.

While Apple computers generally will have better support, they will be very slow due to unified memory itself. I'm not sure if this is actually the future.