If all your devices are WiFi 6 capable that is impressive, and I agree, don't bother swapping to the WiFi 7 router yet. Keep it if your 6 router fails or you get a WiFi 7 device. WiFi 6 can easily do the gigabit speed.
WiFi 6 is a useful improvement over WiFi 5 for homes with many people and lots of devices, WiFi 7 is not yet essential.
My TP link is Wi-Fi 6, my phone goes to Wi-Fi 6e, I just did a speed test on my phone using think broadband speediest on Firefox and 414Mb/s down and 237Mb/s up, I am in a spare bedroom and the router is in the room below me.
My broadband is just over 500Mb/s both ways. so Wi-fi 7 may be faster, but I doubt he would notice.
Myself, i have every thing I can link up with Ethernet, only phone, the echo dots and my smart plugs that are not connected via Ethernet. Even my printers are.
I don't like Wi-Fi, I find it unreliable and iffy, certainly on the 5Mhz band.
I certainly would not splash out on a Wi-Fi 7 router if i had a good router with Wi-Fi 6 already. My TP link will be over 3 years old in July, unless it goes belly up, it is staying.
Still up to him at the end of the day.
Adrian
Desktop machines Mac mini pro with macOS Sequoia, also pc Ryzen powered with windows something or other.
Zooming with Zzoomm FTTP,