I use Google Chrome on my computer (a MacBook Air) and on my phone (a Google Pixel) — by logging in with my Google account, I have full access on any device to all of my bookmarks and saved passwords and every other convenience that comes with modern, customizable web browsers.
I use Google Keep as my primary notes app. I add notes to it on my phone, and they show up instantly on the web version of Google Keep. My notes come with me to any device I'm using, just like my contacts (Google Contacts) and my photos (Google Photos) and my email (Gmail).
I could be using an iPhone X, an iPad Mini, a Samsung Galaxy S9, or whatever else — it doesn't matter. I no longer consider the difficulty of switching between devices, because it no longer exists. I move my SIM card to the new device, log in to Google services, and I'm good to go.
If I were using iCloud, Maps, Contacts, and Apple's other "ecosystem" hooks, switching devices would be far less easy. It would make much more sense for me to simply get another iPhone, even though I have no interest in spending $1,000 on a phone without a headphone jack. It's that lacking flexibility in Apple's approach that pushes me away.