I have an M1 Max Macbook Pro, and having used many employer's newer variants of M-series macbook's since then, I'm still very satisfied with my M1 Max but

the air series is really good, and very light

my M1 is now noticeably heavy and I don't think upgrading to another Macbook Pro is the move the resell value of the M1 did not hold, specifically the bumped up storage models. There doesn't seem to be a market for 8TB of space specifically, but the base 1 - 2TB holds its value because the baseline of the MBP holds its value

M5 Max looks tempting if there is a very compelling tradein, but the M1 Max is pretty old so I don't have real hope of that, but I'll look. For AI Inference the difference doesn't seem good enough yet and necessary enough. I'll still need to use the cloud or aspire to have a specialized machine with more RAM or circuitry on my network.