Can i use AC + N simultaneously in 5 GHz without drawbacks on this Device?

Hi Guys,

rather basic question but i still was not able to get to the bottom of this with google. The firmware allows for me to select mixed mode (AC+ N) on 5 GHz as well as channel width of 80 Mhz. It's a Linksys EA6300. I have i think 1 or 2 old devices which would benefit from N but do not have AC standard.

My question is: Does the router serve all devices individually with the best service (AC or N), while not reducing the service to N for all devices if an N devices is detected?

Thanks

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(if it doesn't work, i can still use 2,4 GHz for N. But here it's the same question. I can select "mixed" so it supposedly uses either N or G service - will it work for every device individually? )