I’m always happy to chat if you ever want to see some larger sites in action using TCMS
Maybe it hasn’t been for you and your purposes but for what I was hoping to use it for it was.
You are limited to the built-in fields present, you cannot add as many custom fields as you need.
Correct, it’s not unlimited, but TCMS 3 will be, and there is a preview of it happening at the Stacks Summit this weekend. Once that’s released, you can do what ever you wish.
I sincerely hope it does see a release soon, it’s been many years in the coming.