Update to my own post now that I've just received my 14" M1 Max (24-core), after a 7-week wait.
Here are my initial impressions:
1) It felt a lot smaller than my current 2019 MBP16!
- It's a lot less physically imposing in terms of the desk space it occupies
- The smaller screen real-estate was quite noticeable and I've set it to "more space" which is a lot closer (within 10%) of the resolution of the MBP16 default, but it is *slightly* on the small side for reading without adjusting font sizes.
- Track pad size difference is noticeable, but keyboard feels somewhat better.
- The touch-id button is larger and easier to use than the MBP16 and the wake-up is near instantaneous compared to about 6-10 seconds on the MBP16.
- Overall, it looks more like a portable device for moving around with, rather than sitting in one place. I like the look of it, and expect I will adopt my muscle memory to handle the smaller wrist rests and trackpad.
2) The screen size would be more of an issue if I end up using this for many hours without a monitor. I almost always use at least one external monitor at home or in office, so don't expect to use the internal screen alone most of the time. This choice largely informed my choice to go with the 14" along with the benefits of better portability.
I am a little concerned that the 14" screen might not be great if I had to spend all day working with it; I recently spent 3 months away from home with my MBP16 and it was fine as a stand-alone machine. If I were going to do this with the MBP14, I would consider either simply buying a cheap used monitor at my destination (if staying somewhere for several weeks), or buying a portable 16-20" monitor. I'll experiment using my 11" iPad Pro as an additional screen to see if this is sufficient which would be a lot less hassle and expense.
3) In terms of performance, what can I say? It feels very fast, but then so does my much cheaper M1 Mac Mini.
- The only real "test" I've put it through is reviewing a large quantity of 4K 10-bit 422 camera footage from a Panasonic Lumix GH5. You need 3rd party software to view these files (Quicktime doesn't display 10-bit 422 H.264), or to use Final Cut Pro. For previews I've used "mpv" or a better derivative called IINA. On my MBP16 this will almost immediately ramp-up the fans and cause a lot of heat, and deplete the battery within 45-60 minutes. On the MBP14 it is *much better*. CPU temps get to about 75 degrees (from TG Pro) and the fans spin up to about 2600-2900 rpm which is only just audible in my office with other computers running, so this is a huge improvement. The first time I ran this test, the fans did ramp up and I thought I'd found a weak point...but I wasn't able to repeat this, and there may have been some other high CPU process running that I wasn't aware of; unfortunately, I didn't check so I don't know for certain. I'll see if it re-occurs.
- There were no stutters or hesitation with non-proxied 4K camera footage which I often had with the MBP16 (with 8GB AMD 5500M). I think I can probably get away with not using proxies with this computer which will be a big time and disk space saver
- External USB disk speeds (Samsung T7/T5) are slightly better than the M1 Mini, but not as fast as with Intel Macs, as expected and explained on the "Constant Geekery" YT channel. It's OK and was expected but not ideal.
- I had no issues with the SD card slot with my Sandisk and Toshiba cards, but speeds were lower than expected (c. 165MB/s read/write compared to about 260/240MBps with my SanDisk dongle. Not great; not terrible....
- Memory usage on my 32GB model seems well behaved and maybe slightly better in Monterey than on Big Sur? I won't be able to tell until I start using it for my usual workflow (I'm still transitioning software etc from my MBP16 and M1 Mini)
4) Thermals seem to be quite well behaved and the case only get moderately warm, not unpleasantly hot like the MBP16 when under load. The underside gets warm when pushing the CPU moderately hard with video decoding, but not uncomfortably so, and I would think I'd be OK using this on my lap if I had to.
5) Downsides? Apart from the pretty steep price, not much so far. I haven't tested battery life so can't comment on whether this will be good or bad, but it's definitely looking better than my MBP16.
Unfortunately, it doesn't quite fit in my LowePro camera backpack which has a laptop compartment. I expect a 13" M1 MBP or Air would fit, but the MBP14 is just a few millimetres too wide in its back-to-front dimension for me to close the zip without risking scratching the computer. If it were thinner the bag might have enough space to stretch sideways a bit; pity...
So far, so good.