Some financing leads to ownership. Leasing a car does not lead to ownership - it is an extended rental.
I am not a fan of products that make it difficult to unsubscribe, but I do like the variable cost aspect of SaaS. Generally quick to start using and quick to stop.
I have not seen it commented on, but my sense is security is easier with a SaaS model. How many pirated versions of software have you come across in your career pre-Saas?