Yeah ... good luck running 8 GPU's on one motherboard.

be patient my friend, dont be mad or angry just bc you dont know , dont understand something

your time will come ... few more months and you will see the light again ... just like you saw the lights after 6 months about how 8 gpu can work with one mobo

soon you are going to post something like you did in another topic about that 8 gpu and one mobo few months ago

just be patient and learn about new things , dont refuse something just bc you think its can not be done

give yourself a few more months , (in your case you might need a year , last time is take you 4 months ) , be nice with another forum members

I take my words back. I now have several Z270 boards that run 8 cards. Also have ordered the Biostar 12 card board.
HINT:
If you already have Asrock H110 Pro BTC+ or BIOSTAR TB250-BTC PRO you have better chance to find out how is that 10 gpu (amd or nvidia) build can be done with windows 10 enterprise ( let me help you a little bit , its a 2016 LTSB )

I learned from people who had actually done the 8 card setups and could demonstrate/prove it, so that changed my attitude towards the max no of cards.
To me looks like you changed your attitude after finally you was able to run 8 cards , not bc another ppl demonstrated/proved , but bc another members helped you to archive that 
I take my words back. I now have several Z270 boards that run 8 cards. Also have ordered the Biostar 12 card board.