They're cheaper to make this way. It's not 4 screws in the earlier models, it's more like 100. Fitting those, even with a special mechanism will be more time co

They're cheaper to make this way. It's not 4 screws in the earlier models, it's more like 100. Fitting those, even with a special mechanism will be more time consuming and problematic than riveting. They don't care about repair. They are optimising solely for manufacturing.