The keyword in "Software as a Service" is not Software; it's the Service.

In the early days, the tagline for Salesforce is "No Software". It's secret recipe is this: your sales team only need a browser and a credit card, to get the service. No software installation needed. Even if you have a genius can code something equivalent, it will never be a "service". That genius is not going to support it, not going to add storage for you, not going to restore an accidentally deleted record for you. That takes an army to deliver. It is a service.

Of course, Marc Benioff kind of shot himself in the foot by trying to get ahead of the AI curve... and gutted their customer service division. If the service is delivered by AI agents, what is the selling point again over other AI agents? They have debased their key strengths and are getting punished for it.