What's more reliable for in-home streaming: Powerline or wifi?

Hi! I have a relatively big and old house (17th century) so network coverage has always been problematic. It's a listed historic building so busting through some walls for ethernet cables is something that's better avoided

Some years ago I tried in-home streaming via older 2.4ghz wifi through a chain of two repeaters. It was a complete mess even at very low resolutions like 720p.

Later I tried powerline adapters and while general internet usage was more reliable when settings were optimized for maximum stability (resulting in less than 200 mbit througput rate), streaming was still not really possible. The electric grid of the mansion is a bit of a mess as well.

I'd like to give it one last try with more expensive state of the art technology. But I don't really now what to choose. I know that wifi has gotten much better over the years. A friend actually has a faster connection to his router via his wifi 6 antenna than via his cat6 ethernet cable. My guess is that the latest technology in wifi has gotten better than recent powerline products which would be limited by the complex and ancient electric grid anyway, but that's just my guess. What do you sugest?