regarding .net core/.net 5/6, that would be an addition for which i would pay. in other words, if you could produce a dnn platform version ported to .net 5, i would be able and willing to pay a modest amount. i could not afford the 8,000+ usd price tag of evoq, and even 1000usd would keep me on the fence, but 300-500 usd is very palatable.
my interest in .net x is the performance from the updated threading (and maybe process management) models. that is seo you can believe in :-o
i do get 95-98 on my desktop page speed score, but 80-82 is a good run on mobile - although i got a couple of flukes at 85-87.