While the Pixel 6 ushered in three years of major Android OS version updates and an additional two for security patches, that’s still nowhere near the longevity of the iPhone. Google hopes to change that on the Pixel 8 and 8 Pro with noticeably more OS updates.
Their batteries are currently replaceable. I’d say, personally, that they’re the easiest batteries to replace. But if you don’t know how to do that, the EU is mandating removable batteries again soon. So maybe the Pixel 9 (maybe even the 8) will have it