Yep. There isn't necessarily an obvious English-language hierarchy between all those adjectives they're throwing around, so (if Gurman is correct) they are sortof trying to manufacture one. Weird, indeed.
Many of us got used to the fact that the "Pro" name is not to be taken 100% literally, but Apple branding is still a memefest when it comes to some of this stuff. I wish they would choose ANY other way (...okay, except maybe not "Late-2022 Processor") to brand these SoCs.
Actually, I find Apple's naming scheme, although far from perfect, way easier to understand than the naming schemes from the competition.
M2, M2 Pro, M2 Max, M2 Ultra. Not very complicated. Pro and Max is clear to most partially because the same naming is used for the ubiquitous iPhones. Max and Ultra could be confused by the uninitiated I suppose, but the pricing differences on their website makes it obvious immediately.
Adding M2 Extreme or something like that could cause a bit more confusion, but as mentioned earlier, my prediction (without any inside info) is that these chips could be called something else entirely because of the use of a different memory architecture.
BTW, while Gurman has been proven to be very accurate for the tech details of the M1 series chips, IIRC he didn't actually predict any of the names. So while I believe the Mac Pro chips will be based around M2 cores, I suspect that "Extreme" name is just a placeholder for him until we know what the actual name is.
I am hopeful we will see the Mac Pro this fall. I'm not counting on it, and I wouldn't buy one, but I'm just curious to see what Apple will bring to the table in such a desktop. BTW, we already KNOW it's coming, since Apple said so itself, so it's just a matter of when.
All I care about is the M2 iMac to replace my 2015 27 inch iMac. That’ll be a huge upgrade for me and my workflow since I work from home.
My friend with the 2014 27" iMac got sick of waiting, so he just bought a Mac Studio with Apple Studio Display. I personally will keep my 2017 27" iMac for quite some time, and it officially gets macOS 13 Ventura too. However, I will replace my 2014 Mac mini with either an M2 or M2 Pro Mac mini, to be used with my 30" Cinema HD Display.
I would love to see a 27-29" Apple Silicon iMac get released, but at this point I'm not 100% sure it will see the light of day.