I am being a bit over the top funny on how much I hate iOS, so please don't take super serious here Even though I think it's a ********* smartphone OS, but that's me.
But as far as the Pixel 2 lagging ? My Wife and both have the Pixel 2 XL, bought them last December, and fast forward today, it's really as smooth and fluid as the day we got them, no lag, no hiccups, no freeze ups, or anything. "It just works"
And now the Pixel 3 XL, will have the SD845 + 6GB RAM, I expect it to be smooth as hot butter.
Is stock Android "boring" ? Sure yes. But I don't care, I rather have a plain stripped down OS, that runs smooth fluid and fast, as opposed to a OS like Lagwiz, that has almost too much going on, too many apps, too much bloatware, that bogs the phone down over time. I like a clean OS like stock Android, that performs at warp speed, and smooth as running water of the faucet.
All leaks point to 4GB.
Also, I think lagwiz is overstated.