It's a consumer grade computer. We're not talking about a high performance aircraft, safety critical application, medical accessory, being in hazardous or corrosive environment, something that needs solvent resistance, or vibration resistance. It sits on a desk, that's it. There are tons of screws they could choose from.

Not to mention Apple's non-standard-compliance is a notable exception, not the rule. The 30-pin connector and Lightning are basically the only proprietary connectors they've had in recent history, and one is phased out while the other is being phased out as we speak (for the standard USB-C, I might add).

Firewire, USB-C, Bluetooth, POSIX, etc... Apple doesn't do as much non-standard stuff as people on the Internet would have you think.