I think you are both right and wrong! You are old enough (I assume) to remember really dodgy wifi but it has moved on and APs from nearly all vendors are reall

I think you are both right and wrong! You are old enough (I assume) to remember really dodgy wifi but it has moved on and APs from nearly all vendors are really rather good. ISPs in the UK (I can't comment elsewhere obviously) have generally woken up to delivering really quite decent "hubs" instead of a shonky Thompson Rainbow type device. That said, even those have some mileage with a firmware change. It's all about tools for the job. You know as well as I do what drywall/plasterboard does to wifi or what a skin of bricks does to wifi propagation, compared to generally wooden construction. Yes, running a CATn cable will nearly always trump a wifi connection but it's fixed. I personally stick to CAT5e at home instead of 6 but I won't rule it out in future. 5e -> 1Gb/s over 100m. 6 ... which one? 6 is nominally 10Gb/s and 6A is 40 I think. 6A needs the shielding to be earthed properly. I run most things over wifi if I can. My servers have fixed ethernet and things like my doorbell obviously get a PoE CAT5e connection. ... ... ... obviously!