I've used OpenBSD as a laptop daily driver for nearly 20 years. It's small. It remains mostly consistent between updates. In fact, it's so stable that I barely notice changes when I upgrade until I go hunting for them.
The Lenovo laptop I use as my travel laptop and console display is a 2012. It still runs OpenBSD just fine.
The Lenovo laptop I use as my travel laptop and console display is a 2012. It still runs OpenBSD just fine.