It seems during the 1960s, many readers had natural inclination towards Superman and Wonder Woman as a "team". And, seeing how the idea never died, well, the rest goes without saying.
I present these two fanmails:
https://imgur.com/a/ddtHrW1 (forewarning, these are screenshots from my Samsung Chromebook)
One reader is happy to see Superman and Wonder Woman as a team again. The other finds them boring because it's been done too much, this reader also mentions "romantic readers". so it's clear . Which is very interesting question; does Superman and Wonder Woman lose the appeal if it's done too much or with a lack of creativity? In my view, pairings like Superman and Wonder Woman needs a dedicated team (or writer) to get it right. I digressed, this brings me to my point. If by any chance Superman could've appeared more during the original All-Star Comics run, do you guys think the readers of the of the 1940s would've been open Superman and Wonder Woman?