OpenWrt is more of a replacement for the market routers. It's a nice Linux-based router distro with a good/great ui in LuCI. The downside of this is that upgrading OpenWRT is a bit similar than upgrading a closed-source OS of the consumer routers: you flash it and you must reinstall all packages after the upgrade. This means an upgrade between major versions is maybe a bit too much of work.

OPNsense/pfSense have similar upgrade strategies as FreeBSD has: you upgrade the core os to the latest version, then all ports. This is usually a really simple and kind of boring system, which is something you really value in a computer that manages your whole house's internet traffic...