You're not playing the same game. I'm in Odyssey.Well, I gave Plat mining a try to validate it is working and it is fine.
Found double Plat Hotspot in Pristine Metallic ring 2500LY from sol which I have been using for 2 weeks.
I tried in EDH3.8, logged into EDH4.0 and carried on fine, LOADS of loverly Plat.
Logged off and into EDH3.8 and still OK, back to EDH4.0 and all fine.
Don't have EDO so can't comment on mining there.
HOWEVER, the graphics in EDH4.0 are so terrible, it is unplayable (read unwatchable) to me.
The ship and asteroids are blocky and contrast is far too high, it looks like a poor 1990's video game.
Returned to EDH3.8 and back to a beautiful immersive universe, almost like actually being out there as I am used to.
Think I will be leaving EDH4.0 alone until absolutely necessary for me to move from EDH3.8 for narative/content.
I will also review EDH4.0 after I get my new 1Gb/s Full Fibre installed (on crappy 57Mb/s Sky ADSL ATM).