Ah, Neemobeer. I can always count on you for an entertaining reply, assuming that I find being totally confused entertaining. Please allow me to edit what you've given me here and see what's left.
"both wireless and powerline can suffer". Since I'm asking for pros and cons, this is a null response, so I have to reject it, but thanks anyway.
"older wiring". Ours dates back to 1945 or so. Score one for wireless.
"Speeds ... comparable". I'm getting a semantics attack here. Of course they're comparable -- I'm comparing them! I assume you're saying that they're equal, for all practical purposes? This blew my mind, since I've been told by my phone company (ISP) that wireless will give me maybe 50% of wired performance. I checked the manual on this router, and I got even more confused from the following entry under technical specs :
I see the 802.11ac, so it looks like another (little faster) score for wireless, in spite of the phone guy. I have no idea what lines 2-4 are trying to tell me, although the 2.4 and 5.0 GHz rang a bell because it's a dual-band router.
"don't have to buy extra hardware". We have them in hand, since the grandson switched to cable. "do not have wireless capability" belongs in the null response category as well.
"can consume outlets". Give me a little credit here. I kinda figured that out for myself when I saw the prongs on the plug. I'm old and forgetful, but I haven't lost it all yet.
So when all is said and done, between the phone guy and you, I'm left with a performance factor for wireless vs. powerline in the range of .50 to 1.xx. Until I hear something more convincing, I'll go with your recommendation, especially since we've been "connecting wireless to the router from the kitchen PC since day 1."
Thanks, and have a great day!