I do. yes. But the latest stock firmware on that router is surprisingly stable and performant. Not a bad idea to do some burn-in testing with that to see if it meets your needs. If you need to tweak phy layer knobs like tx power etc, you'd have to switch but otherwise there's probably not a need for most folks.

Also, open driver support for broadcom chipsets is very lean, so getting openwrt to work on the wireless side is a bit of an effort. Doable, but definitely not simple out of the box.