Whether to show a logout link or a login form is presentation logic, not business logic. I've spent decades telling people that trying to keep logic out of tem

Whether to show a logout link or a login form is presentation logic, not business logic. I've spent decades telling people that trying to keep logic out of templates is a waste of time. A useful templating language has variables, conditionals, and even functions. There's no reason not to use a real programming language. There's no good automated way to enforce MVC. How is an automated tool going to know whether "show this number to two decimal places" is a model thing (inherent precision of the data) or a view thing (presentation choice)?