Hey @thelukasoliver!
Yes, it does, which is why there are many, many ways to store a variable! This is more of a “Local Var” situation. You don’t want to have a lot of blueprints generating a lot of new variables all at once, but you can do things like save variables to a SaveGame file to load it into ROM instead of RAM if it’s REALLY big.
But usually, storing the variables like this really isn’t an issue- they vary, but most types of variables are INCREDIBLY small. Bits and bytes, not Kilobytes or Megabytes.
Also you don’t necessarily want to include EVERY variable you can fit into one struct- if that struct includes unused variables it’s wasted overhead! 