I just downloaded QGIS to take a look. On my Mac, it takes 2.1GB of disk space after installation, which has some notable space sinks:
* 562mb of Python 3.11 and libraries (of which 240mb goes to the qgis python library, 101mb goes to duckdb, and 50mb to PyQt5) * 130mb to i18n * 140mb to `libclntsh.dylib` which I think is the Oracle DB client library? * 80mb to libduckdb.dylib, separate from the Python version * 80mb to libQtWebKit