Also notable is this statement in the context of modern SaaS products: "Who knows whether a new version will be available and usable when the current one stops

Also notable is this statement in the context of modern SaaS products: "Who knows whether a new version will be available and usable when the current one stops working?" With SaaS products the company can go out of business; they can change the product on you without your opt-in, making it unusable (or less usable) for your purposes and there is no way to downgrade to the previous version; they can stop supporting your web browser; your account can get disabled or compromised; new policies and regulations on data retention and privacy could render a particular SaaS product unusable for your purposes. What are you meant to do if a SaaS tool you depend on suddenly stops working? How do you install the old version and get back to work?