The other thing I feel like is that it's a fairly hard concept to balance and create a system where everyone can actually find time to shine. Because in practise, a game where one player wants to be "Batman" and another player wants to be "Superman" probably means that the superpowered players are going to be incredibly powerful with a versatile array of abilities whereas "Batman" is probably going to struggle to feel like an equal part of the team,
Actually it's pretty trivial to model a Batman that works on the same level as Superman - you just have to use the right system.
I think the question really is, are you going to be modeling "people with superpowers", or "comic books", because depending on the answer, you'll get very different results.
"People with powers" is modeled quite well by games such as Aberrant, Mutants and Masterminds, Hero, and a whole bunch of others. They have a lot of flexibility, and people on the same power level tend to work will together. BUT, if you try to emulate heroes of ostensibly different power levels, you got problems.
"Emulating comics" games work by abstracting the powers and abilities, and look at it from a dramatic POV of "how do you approach this problem?". The truck is that abilities don't actually have concrete measurements.
So for example, in Fate Accelerated Edition, you may have "Strange Visitor From Another Planet" and "Caped Crusader". And they could approach problems like:
*Cross a chasm between buildings*
"I fly across"
"I use my grappling line from my utility belt"
Ok, you have permission to not even need a roll for that.
*Lex's goons unload heavy weapons on you!*
I Quickly dodge with the martial arts part of "Caped Crusader".
OK, roll Quick."
"+2 + *roll* 2. So 4."
You gracefully Dodge the bullets. Now Supes."
"I'm going to use "Strange Visitor" and let the bullets Forcefully bounce off me
"OK, roll "Forceful"
"+3 + -1. So 2. Drat."
"OK, one of them had a grenade launcher, and it launches you back into the museum exhibit. You aren't hurt, but take 1 Stress."
Likewise, in Masks, Princess Tiffany, daughter of Morgash the Planet Eater will use Freak to use her energy powers, while Urban Ninja will also use Freak to parkour up an alleyway. And I'm Sentinel Comics RPG, all characters will build actions from a pool ranging from D6 to D12.
The limitation is that this can a problem for people who think of powers in a tactical or real world sense. It doesn't make sense to them that a Kryptonian and a human should be on the same level (r/powerscaling can just SHUT UP), even though if you watch Justice League, just that very thing happens.