The only gateway I needed was a work-provided iphone 6. Soon after, I switched my personal phone to an iphone 6s, and I was all in after that...macbook, watch, icloud, etc...

Honestly, before I was 'forced' (for work purposes) to use an iphone, I wasn't a fan of Apple - although I admittedly never tried using one. Since then, the three guys that sit near me at work have bought into the apple ecosystem as well.