> it's massively expensive, both in terms of actual dev time per feature (easily 10x the cost), and also in finding specialist developers who know these dated t

> it's massively expensive, both in terms of actual dev time per feature (easily 10x the cost), and also in finding specialist developers who know these dated technologies What are you basing this on? There are plenty of iOS developers, and developing for Mac vs iOS is more similar than pretty much any two other dev platforms you can name.