How much editing are you doing in Adobe? Specifically, are you using Lightroom (classic or otherwise?)
I had the 15" 2018 MBP with a radeon 560x and 16GB of RAM, and had both the 8 and 16GB model of the M1 Macbook pro's for a bit and did some comparisons between them. As a part-time wedding photographer I was trying to edit an engagement shoot and experienced some issues with the 8GB model. People said it was because I skimped on RAM but upon receiving the 16GB M1 the performance difference was only slight.
The curious thing is that, for the exact same workflow between 3 devices, while the M1 16GB was the better performing one (by a hair), the RAM usage was always maximal- with very high swap used (writing Terrabytes to the disk/day). BUT the intel MBP was only using 10x less RAM for the same workflow with 0 swap used.
Some of us on r/Lightroom were speculating that it could be caused by Rosetta, but even Lightroom CC (running natively) is consuming a ridiculous amount of RAM. Another theory is that the RAM is being shared by the graphics processor as well because of the M1 SoC, but it's also speculation.
I would add that the swap used is lesser on the 16GB model than on the 8- if you're worried about the longevity of the SSD's, it might give you some peace of mind to go with the 16GB model if you're going to be a big LR user. (mind you, the workflow I was using involves 500+ RAW files from a 30MP camera)
On another note, I'm quite agnostic about whether a high "swap used" will hurt the longevity of the drives- people who say that the swap usage is a drop in the ocean of SSDs often neglect the worries of having literally terabytes written on a disk per day. But on the other hand, Apple has some great engineers and I'm sure they know what they're doing. And if they don't (like in the case of the butterfly keyboard), they have a solid reputation of offering good repair services even past hardware warranty expiry for known problems (albeit, having a hard drive fail on you seems a lot more disastrous than having a keyboard not work)
Here's a short video that I did demonstrating the odd RAM usage between devices: