I used to be an all-in Microsoft person. Had Surface RT and Surface 2 tablets, numerous Windows Phones over the years, and of course Windows PCs (and a couple servers) at home. One of the main reasons I bought a MacBook years ago to replace my Surface tablet was for Continuity, Handoff, and specifically, the messaging integration with iPhone.I don’t use a combo of Windows-based PC and an iPhone, so I struggle to see the point here. From what I can tell, I’d probably just use my iPhone for messages and calls as opposed to barely doing so on my PC.
Being able to seamlessly switch between devices and continue the same conversation from phone to laptop with a real keyboard is incredibly convenient, as is being able to respond from the same phone number/service regardless of which device I'm using. The last thing I want to do is constantly have to stop what I'm doing, pick up my phone, tap out a message on the tiny flat screen when there's a full keyboard right in front of me, then switch back to my laptop to continue working every time I need to respond to a message. Nor do I want to have to tell somebody mid-conversation, "Hold on. Let me text you now. Gotta switch from Messenger to SMS because I'm about to step away from my computer" every time.
I'm actually using iMessage with someone right now and just flipping between Safari and Messages using Cmd+Tab to read and respond as I need to. It's just so convenient.
Microsoft briefly supported this Continuity-style messaging with their Messenger service and the Messaging app on Windows 8 and Windows Phone. Microsoft had even entertained adding SMS support to it at one point, but backed off when they decided to move in the direction of Windows 10 and the short-lived Windows 10 Mobile.
Since then, it was clear that Microsoft had become rudderless as they tried to figure out what they wanted to do for an ecosystem play since they were abandoning Windows 8. Their entire products and services catalog became a disjointed mess that struggled to work together in ways that seemed very obvious to an onlooker and had significant holes in functionality that Apple and Google had no trouble filling. I came over to the Apple ecosystem largely because the integration that I was seeking from Microsoft actually existed here, and it wasn't a pet project that might go away on a whim, as it did with Microsoft.
Nearly a decade later, Microsoft finally, sort of, catching up to where they were planning to go in 2013 affirms to me that I made the right decision.