This all makes it sound like I'm a fan of SPDX so I hope people
understand I'm not.

You made my day :)))

Basically, SPDX is the worst license
representation system we have

From the set made of one. That makes it worst and best at the same time. :)

Or I missed interresting system?

-- 
Miroslav Suchy, RHCA
Red Hat, Manager, Packit and CPT, #brno, #fedora-buildsys