I think part of this is Apple constantly deprecating core functionality, combined with the threat environment. People can't just not update their computers any

I think part of this is Apple constantly deprecating core functionality, combined with the threat environment. People can't just not update their computers anymore. And when you do, old software stops working. So you have to update that, too, often upgrading to a new version and paying for it (or else already being on a subscription plan). This means that a large part of your software budget is eaten up by the overhead of just keeping up to date. Relatedly, SaaS/subscription pricing means software companies are less incentivized to make new software versions enticing. And the hassle of switching subscriptions means transaction costs and lock-in. Consumers aren't likely to switch apps and newer versions of apps won't likely get any switchers because their improvements are incremental at best. So what's the business proposition for a new first-class desktop application?