@JERMLB 

Just my personal two cents on this one, but honestly Tri-band is NOT a big selling point for most people.  

Keep in mind that this will only work if the device connected to the x90 also supports the same 3x3 at 160mhz, which is very very rare!   From experience, unless you specifically buy a 3x3 card or purchase a really top spec laptop this isnt going to be the case, the only time ive ever seen a card to support the full speed was when I specifically bought one for that purpose, the average iPhone and laptop will likely never have this capacity.

The Deco x60 is likely to be the fastest that most hardware will ever connect (Phones, tablets etc), it should be more than sufficient for a few years. 

Likely WiFi7 would be pushed out before we see the full capacity of a x90 in a phone or laptop.