For those users who have already upgraded their Pocket Reform do you have any feedback for those of us still looking to make the leap?
Things I am interested in are:
-What kind of battery life hit are you seeing with it?
-What kind of additional heat are you seeing?
-Are there any negatives that develop due to the new SoC?
I am very happy with the imx8m+ but I would be lying if I didn’t admit that 32gb of RAM in the pocket is just too tempting.
I can’t speak to the comparison because I basically never used the pre-RK3588 version. However, I am not getting great battery life. With the screen brightness at one notch above zero it’s maybe a couple hours, just sitting idle.
Again I don’t have a comparison, but my lid gets noticeably but not worryingly warm. Taking a slow scan of the lid with a laser thermometer shows a range of 26 to 37°C, with the bulk seemingly around 30.
I’m still (gradually) getting to know the device, and nearly 100% of my experience with it is exploring and configuring it rather than actually using it. I don’t know how much is different between the RK3588 and stock, but as an example I’m not sure if my difficulties getting bluetooth working are related to the RK3588 or are more general issues with the PR — this is probably the result of my incomplete exploration of this forum combined with being somewhat distracted.
I am getting around 4 hours of usage out of my imx8m+ pocket reform and very happy with it in that regard. But, I also ordered the RK3588 upgrade, and now worried about the battery life decrease, if that’s the case. 
Couple of hours on idle sounds to me like there must be something wrong, can any other user of RK3588 pocket reform confirm this, or maybe a different experience?
Do you know what cpu governor you’re using? Ondemand or schedutil? I’m wondering how much switching to powersave would help. 
I’ve never tried to look into changing CPU governors, so I’m using whatever the default is. I’d be happy to try changing it to run an experiment.
I think I’ll do at least one semi-real experiment anyway and have it log battery level over the net so that I can see what it’s actually doing there instead of guessing.
Do these SOCs even have power profiles like that to be used? Would be awesome, but I was under the impression that these were not available / possible.
It’s not really a power profile but how the CPU speed and power increase/decrease. The powersave cpu governor will try to keep the cpu at the lowest frequency that uses the least power. You can also do the same thing with the ram.
So a power profile to save power would probably be changing the CPU and ram governors, or turning off the big cores and just using the 4x a55 little cores, decreasing screen brightness, disabling radios, and maybe the npu too. You could probably use a script to do it.
I timed my rk3588 pocket reform, reading pdfs and playing flacs without resampling.
The screen was at 40% brightness with powersave cpu governor. The user interface was exwm and xorg.
I got 2:30 h:mm from 100% to 4% battery charge. Current draw was around 1A.
Ok this seems like it is about a .300A average increase with the RK versus the imx8m+. Not too shabby for the serious performance boost that the RK brings.