Right now, there is no "best". If the masses want TC, it's there. Plenty of offerings to choose from. If nickle was the best, this conversation would be over. But it isn't the best.
Ti is better so some do that. SS is better for everything, and kanthal52 keeps popping up for some reason. Only a couple can do SS.
Software is an obvious evolution. Everyone will do it soon. Not too revolutionary.
Evolv did it right. Allow user to enter TCR... They will all allow that soon. It's too obvious now that a couple do it.
The only problem right now, we all seem to know how it should be, but only a couple do it. Is the DNA the only one with TCR change and software with plenty of power? But the DNA still needs to be "proven" longterm. And the 900 mah lipo is just silly. Capacity is just not something that should be talked about. 1300s are available, and can be sold as "better" than dual 18650s. But right now, a big complaint of the 200 is capacity.
So a year from now... Good batteries, plenty of choices, TCR, software... But right now, you can have this same discussion every few weeks.