Thank you for the extensive comment.
I've seen devices with 4 ports with a total limit of 1GB so 2.5 already is better.
I read your reaction about the interference and cooling issue also on the bpi forum.
I always assume(hope) manufacturers are taking this kind of stuff into a count. but of course we can't be certain until someone gets there hands on the device.
I think you have a lot more knowledge about this stuff then I do.
Do you have any info on the software/openwrt support? how is this handles, is this handled by the openwrt team? or do you depend on the bpi team for making openwrt compatible?
For the goal I have in mind the R4 is a bit of an overkill, but the improved memory and cpu in comparison to the R3 might be interesting.
I'm planning the use the device as router, and part if my roaming network. On top of that I'm planning to use docker for pi-hole ans some NAS system. so the NVME part is also interesting, but there also is a lot of stuff on the board I don't need.
What I'm also wondering, but probably no one knows untill after the release is how do I know which SPF modules are compatible, I checked for the R3, but nowhere could I find a straight answer.