Apple Firewall, turn on or not? What security threats does it defend against in 2025?

iMac M4, so it's not gonna be in coffee places and so on. It's just gonna sit at home, connected through ethernet or wifi to my own router. Is there any reason to turn on the build-in firewall? Or is it just something we used 10-20 years ago when the system was less safe, and now it's just a left-over? Because it's turned off by default, and since Apple seems to take security very seriously, and so the fact that the firewall is turned off by default makes me think that's it's not really useful? So, what threats does it defend against? Are there active security threats it can defend against? Do you guys enable it? Why or why not? (I'm aware the *quite popular* [Little Snitch](https://www.obdev.at/products/littlesnitch/index.html)*, and the amazing tools by* [*Objective-See*](https://objective-see.org/tools.html) *such as the firewall LuLu and the great malware monitor BlockBlock. But this thread is specifically about Apple's firewall. My plan/hope is to not need so many 3rd party apps on this iMac*)