@jeffrozica 

I think you want the MLO network on regardless as the Decos themselves can be WiFi 7 MLO clients to each other and hence would benefit from the multiband connections even if you don't have WiFi 7 devices, assuming your home and Deco placement was condusive for multiband connections over WiFi.

Hence, in theory, for example, your WifI 5 device could connect to a Deco node at 2.4 gigs, the node Deco sends that to the main Deco over MLO using say the 6 Ghz band and the 5 Ghz band using all the WiFi 7 goodness like 4K QAM (etc etc), and the main Deco then sends that out to the internet.

My Deco system is in Access Point mode. I have 2 Deco's connected via ethernet to my router. Even in Access Point mode however, there is a concept of a "main" Deco. My node shows connected via ethernet to my main Deco and I cannot change that. My third Deco is connected to my main Deco via WiFi. I have the option to change what Deco it connects to via "Connection Preference"; however, I cannot change "how" it connects, or the "Signal Source". In my case it says the "Signal Source" is 2.4Ghz/5 Ghz/6 Ghz).

Not sure if this helps ...

(Smarter folks ... correct me if I am wrong.)