Just because you use wifi doesn't mean ethernet is somehow depricated. Some choose to not use wifi for security concerns (lots of nonsense with home gear lately),
Even if I had ethernet to every room, I'd still want Wifi since the devices I use every day don't have ethernet ports, so there goes the security (though with careful network segmentation, I could keep the Wifi network separate from the wired network, but that sounds like a lot of work for a home network)
or even future proofing.
Wifi speeds keep moving forward, but are already fast enough that most home users wouldn't notice any difference between wireless and wired speeds. Though as frequencies increase, putting a Wifi node in each room might be neccessary.
There is a simplicity with ethernet that can be appreciated, installing it to every room may not make sense for you, but it may for others.
Hence my question "What do you use it for", which you didn't really answer.