Ever tried to have 60fps on a tableview with constraint-based layout cells ? CALayer is definitely not legacy, it's often the only way to get smooth animation. Spring n struts is also sometimes the best way to get fast position for smooth scrolling.
Ever had to deal with Core Data migration on an app that needs to evolve throughout the year ? Migration is a mess, and so is concurrency.
My personal conclusion after having used Core Data on a pro application for 4 years, is that most of the time i really don't need a database and so i'm back to file-based backups for my app's data. Works well, no magic, and no performance or threading issue.
Ever had to deal with Core Data migration on an app that needs to evolve throughout the year ? Migration is a mess, and so is concurrency. My personal conclusion after having used Core Data on a pro application for 4 years, is that most of the time i really don't need a database and so i'm back to file-based backups for my app's data. Works well, no magic, and no performance or threading issue.