Here at Hardcore Games, Apple hardware is in abundance.
The MacBook is based in an Intel Broadview CPU with 8GB RAM and a 256GB SSD. Machine runs OS X but I have seen some running Windows on them.
The iPad Pro 12.9 has 256GB has enough storage for every ebook on the planet. EPUB is half the size of PDF but the Books app can display them both fine.
The iPhone has become the basic business line. Presently the iPhone 7 plus 128GB is in use and it has survived fine with a silicone protector.
The Apple Watch Series 3 was the first model to be employed. Concerns over the band are moot as it is replaceable. Previous Garmin watches suffered frequent band failures.
The Apple Watch Series 6: Nike has been very convenient as a mobile payment device. The watch also tracks activity which appears in the Health app. The focus on health at Apple has made the watch a much more valuable unit.
Apple Pay has been very useful and its is now very widely accepted. The iPhone 6 and above can handle Apple Pay.
More recently the Apple Watch series 3 and above have taken over the NFC function and even the bar code functions. Apple Pay is also available on the MacBook using the Watch or iPhone.