I switched to a Pixel 3a XL last year. I like it well enough, but will probably switch back to iPhone at some point. I'm still using my 6s+ as a secondary phone.
Apple's services have no hold on me. Back in 2012 Apple wouldn't sync with my PowerBook G4 so I found my own services and have been using those since. I can still use iMessage though as I have a Mac Mini running
AirMessage.
The thing about Android is that the OS allows you to use whatever default app you want to use. So, don't want to use Google apps, no problem. Don't want to use stock Apple apps? Well, you don't get a choice.
I don't use my phones like a substitute computer (I have many computers already that I use as the real thing) so my phone tends to get used as an actual
phone. Therefore, my app use is limited. That's been the same with iPhone as well.
PS. Deleted my Facebook account in Feb. 2017. Had been using FB since 2009 or so on a Mac and then on an iPhone. So, I don't know why people think that just because you use Android you're automatically using Facebook. That app has never been installed on my Pixel.