what do you think about using Trello as a CRM?

Hi.

So I ve been jumping around programs and I am very familiar to Trello.

However Trello is never recommended as a CRM and that's understandable since it not advertised for that.

Still I think it works great as a CRM using the premium version where custom fields can be added, then keeping a simple kanban view of

New leads > contacted leads > hot leads > closed/lost

By using third party apps and rules it's not hard to add functionalities like sending an email whenever a lead is moved from list to list.

How do you feel about this approach ? Is this a good place to start? What am I missing by not going for a full CRM?