I agree with theabovefirst two replies.
By design, 5E also does a good job of letting the player or DM dial the crunch up or down to the level they prefer.
Without a source of comparison, it's rules medium.
Compared to Pathfinder, GURPs, or WHRP it's rules light.
Compared to Honey Heist, Dread, or All Outta Bubblegum it's rules heavy.
Honestly, it's probably closer to Pathfinder than it is to more narrative games like Vampire, Star Trek Adventures, or Genesys. So if forced to choose it'd be heavy.
No, despite the name "Storyteller" all of the WoD games in the 90's were both crunchy and combat-focused, with a kicker that the designers did a pretty bad job, and didn't even know how the math behind their own systems worked. They talked a good talk about being above it all, but they were at least as crunchy as AD&D 2e.I've only played the World of Darkness Vampire, and that felt more rules-heavy to me than 5e. Were the older editions of Vampire a lot lighter?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.