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?