They could probably also cite stats of how it compares to the M1, but that would lead to potential confusion as journalists and bloggers mix up which stat is which. Marketing people want one message, said clearly and repeated often.
However, AFAIK there are none that compare to M1/M2 in terms of efficiency and relative performance.
I might be wrong - I'm comparing an old budget ThinkPad (L580) to 2021 and 2023 MacBook Pros here.
Noteworthy for me is that this 2019 i5 with 16GB (Lenovo L580) still trashes all AMD notebooks that I ever used in that regard. Xubuntu lasted me a work day easily on that machine. But performance was slow of course.
Even in single thread tasks in interpreted languages, the speed difference between that 2019 i5 and an M1 Pro is around factor 5-10, with the Mac inaudible compared to the i5 sounding like a small airplane (cough, legacy webpack frontend build).
Also here, my experiences are probably distorted by price range differences.
Then there's all the stuff that really matters: virtually unlimited multitasking, reliability (wireless, graphics especially), trackpad, speakers, WebRTC, etc etc
And with a current MBP, you really need to do very expensive tasks (ML, huge builds etc) to notice any performance or battery life degradation.
I now have a 2022 M2 13" and I can go 10+ hours w/o a charge doing normal work shit which generally includes 4-6 hours of video chat and 2-4 hours of development.
For me, the upgrade was well worth it. I now treat my computer like I do my phone; I charge it once a day overnight.
Note: maybe not M3 the name, but at least the 3nm transition.
That doesn't get into the battery life. My M1 air has mostly been used on road trips to check email, or do light reading. No video or work. I can get pretty much a full 4-6 day trip on a full charge just doing email/reading in the evening a couple hours a night. This has been pretty fantastic imo. Never had any other device that could achieve that before.
I've used M1 Max and M2 Pro for work, and both are fantastic... x86_64 docker used to be a pretty big issue for some images, but it's been great outside of that. The drive I/O is outstanding, and can build large web/node apps faster than my 5950X desktop with a 980 pro drive.
Biggest down sides come down to the money sink if you want/need more storage or memory in the box. It's WAY overpriced for what it is, and you might be better served with a DIY desktop or framework laptop. There are also some workloads that are a true miss. Not to mention gaming as an entire use case that is pretty poor. Not to mention the UX is rather dated at this point, and I really wish some of the hotkeys were more aligned with Windows and Linux. Muscle memory is a pain when you jump back and forth.
Airs don't even need a fan.