The main culprit for space issues is stuff relying on BAT or CMD files, where escaping variables seems to be a black art. Sadly such set includes loads of Java

The main culprit for space issues is stuff relying on BAT or CMD files, where escaping variables seems to be a black art. Sadly such set includes loads of Java programs. If only SUN had shipped a standard way to generate isolated exe files in 1998... but they worked under the presumption that you'd have a JVM already there, because distributing that monster was difficult in dialup times, so you could just hand people a jar; and the enterprise market did not care, since they had webapp servers. Sadly it's an "optimization" that became obsolete very quickly but wasn't rectified until it was too late (java 9+).