Without reflection, you cannot create a nib system (or any general purpose archiving solution). For Encodable, they used hacks that were tantamount to macros in

Without reflection, you cannot create a nib system (or any general purpose archiving solution). For Encodable, they used hacks that were tantamount to macros in C, but that requires compile-time knowledge of the class/struct structure. That's not how nibs work.