Thank you for taking the time to make such a comprehensive reply.I said that only on the basis of various reviews. But as you indicate, if a user is pushing the core work, then an Ultra M2 would outperform an M3 Max pro. Besides the Ray Tracing issues which might effect some.
Also, the Powerbook is also subject to heat dissipation far more than a Studio. Due to that factor, IMO a MacBook Pro with less cores seems better value to me - because if one is really pushing a MacBook, including the better cooled 16", tests show it will throttle back under heavy loads. So why have the full core model when its likely to throttle back under full duress? However the less core MacBook Pro's RAM is limited to 96 GB. But overall I reckon a 96 GB lesser MacBook Pro with a 2 TB drive seems a better investment than a full blown MacBook Pro.
It all depends on what how one uses it I guess. I presume with the m4 MacBook Pros coming shortly, Apple may not provide a Max version of them until they upgrade the Studio, because an M4 Pro Max would likely be faster all the time than an Ultra.
Another thing is the value side. With a MacBook, one gets a keyboard as well, & a monitor too. Plus a battery which provides some fault tolerance and protection from power surges. The cost accountants would have forbid Apple putting in a battery to make a Studio surge proof and more fault tolerant.
For myself, I wanted Apple to have a PCI option in an affordable desktop. I am also outraged by Apple's lack of upgradability with their internal drives.
Apple used to be the hardware king IMO. Now its a mix of software/icloud revenues, phones and pads, and notebooks, with little interest in its desktops IMO, unless one includes an Apple TV as a desktop, because I think Apple take that device very seriously. IMO if Apple lowered the price on their Studios as they got older, they'd be taking that sector far more seriously. But they don't behave like that which indicates to me they are not customer focused, and they seem to me to take the historic desktop brigade for granted, and treat them with what looks to me like some contempt.
I fear you’re right about desktops. TB5 would be something, I suppose, but I’m not holding my breath. A discrete GPU alongside an Mx Ultra would be nice, too (I also believe in Father Christmas). I have fond memories of the 2008 dual-CPU Mac Pro ….