No new content was added in 3.0.1–3.0.3 — those were only stability fixes.
Impacto para creadores de niveles
The keyword "-NSP-" also opens the door to the world of homebrew and emulation. For those using custom firmware on their Switch or playing on a PC emulator like Ryujinx or Yuzu, NSP files are the primary means of loading games. Super Mario Maker 2 -NSP- -Actualizacion 3.0.3-...