There's a fair amount of subscription-bashing here today, but I wanted to point out one major positive. During both the Classic to Mac OS X and PowerPC to Intel transition, most major software developers waited for the next major paid version to add compatibly for the new OS/architecture. With the software-as-a-service model there's less incentive for the developer waiting to release a compatible update. I suspect some developers who sell paid updates to their programs will still go that route.
(Obviously apps sold through the App Store which get lifetime updates for a flat fee like Affinity photo are a major exception here).
(Obviously apps sold through the App Store which get lifetime updates for a flat fee like Affinity photo are a major exception here).