I switched from Android to iPhone mainly for the iMessage capabilities. I didn’t have any other reason at the time, but now I’ve started adding in to the ecosystem (AirPods, and now an iPad). The integration is really nice and smooth. I do like how “user-friendly” it is - while I can use other platforms just fine, iOS is just simple and easy.
Corporate taxes - at least in Canada, you can have a year end any day of the year.
And yes, some older tax preparers don’t work in summer/fall.