I guess it really doesn't matter.
What I think we can all agree is that there are two different things. One thing is a team that has been amazing and won, and another one is top players coming together to form a team. You can call it whatever you want.
To me, superteam is the term used for superstars who collide to form a team (Heatles). Teams like the 90s Bulls, 80s Lakers, Spurs, etc...those are all time great teams, dynasties, whatever. I don't consider them superteams because that's not what I use that term for. But of course some people might use that term and it's fine. It's just semantics.
I just don't agree on comparing teams like the 2011 Heat/2017 Warriors to teams like the Spurs. They are completely different no matter how good they might be.