Note the date on that essay: it's from 2001. It has indeed come up in court in the last 19 years. For example: https://wiki.fsfe.org/Migrated/GPL%20Enforcement

Note the date on that essay: it's from 2001. It has indeed come up in court in the last 19 years. For example: https://wiki.fsfe.org/Migrated/GPL%20Enforcement%20Cases https://wiki.fsfe.org/Migrated/GPL%20Enforcement%20Cases