Has anyone ever actually completed a to-do list?

Absolutely.

🤔 Think it's on my to do list

Completing a Todo list is on my todo list

I have; takes about a year at times.

I better. I have one week left to complete it

I did mine today.
Take shower, take meds

I completed the list, yes....

... but not all of the tasks or projects listed.

[I omitted training to become a barrister, though....]

Absolutely! Why make one if you have no intensions of completing it?

Only John Ollinger.

Yes but they're very short