Thank you for this! It is immensely useful in my 3D work as post-edit background material. You're right too, you'd think there'd be a lot of these type already in the library - thanks for filling an important gap!
Edited to add:
OH! EM! GEE! After playing with this a few minutes I am convinced it will generate ENDLESSLY fascinating blurs for backgrounds, overlays etc. Just keep hitting 'Next Variant' and/or editing individual settings and nearly every single thing it comes up with is useable. WOW! THANK YOU! THANK YOU! THANK YOU!
The Joy is in The Work