RBM33G + two Wireless mpci-e cards ?

Hello friends, is there a possibility to run two radio modules at the same time on the rbm33g ?
I want to run a split signal at 2.4 Ghz and 5 Ghz , i have one AR9380 a/n and one AR9381 b/g/n HP triple chain cards. Now i use only the a/n card!

P.S. "Insert the miniPCIe and M.2 cards (not included) and secure them with the included screws. [Only one 802.11 wireless card can be used at once]. It is suggested to use the other slot for LTE modems. " .
My question is why only one we can use it, and this is software or hardware disadvantage and if it is software in the future will be fixed with dual wireless card support - it should be the successor to RB433 where I can use three cards at the same time?

I was looking a solution with two wireless cards too, and when I saw the price of the RBM33G I thought something was wrong. Obviously this it’s the limitation the routerboard has, and that’s why it’s more cheaper than the other RB43X models

As I know the m33 is support 2 miniPCI-e wireless cards.
We have tested with 2 cards and is worked
i attach a printscreen

Nice info! You tested it with lots of traffic in both network cards?