They're slow. The only thing a Chromebook has is a web browser. The browser performance of e.g. the Samsung Chromebook 2 was less than half that of its contemporary competitors, and a modern Chromebook with an Intel Core CPU is 5-10x faster.

Exynos didn't even manage to be the fastest ARM CPU in a Chromebook. The Tegra K1 was a bit quicker.

> The only thing a Chromebook has is a web browser

My (Celeron) Chromebook 2 supported a whole Linux VM (via Crostini) and using Vim for python and Go development on it was noticeably slower than any contemporary laptop - I can't imagine the Exynos version was far off on perf (since it was only a diff SKU). I would not call it "terrible".

The Celeron Chromebooks 2 were only slightly faster, maybe 15%. That's why I specifically called out the Intel Core CPU, not the Celeron. The Celeron N2840 is a "Bay Trail" Atom core, which nobody would willingly purchase. The state of the art CPU from that generation of Chromebooks was the 4th gen Core i3, a "Haswell" part that was more than twice as quick as that Celeron.