Earlier this year my Netgear POE switch went bad and stopped routing traffic correctly. It took me 4 hours to figure out the problems was the switch. Luckily I could borrow one of my other switchers to see if the problem went away. That's when I found out how much better performing my newer broken switch was versus my older one. Luckily the Netgear switch has a lifetime warranty and I got a replacement within a couple of days.

Everything is working great, then a couple days later my Netgate SG-2220 goes dead. Netgate support couldn't help me recover the unit. Get a replacement board. Reimage. Found out the Intel Atom's were bricking.

“Intel’s Atom C2000 processor family has a fault that effectively bricks devices, costing the company a significant amount of money to correct.
...
Coincidentally, Cisco last week issued an advisory warning that several of its routing, optical networking, security and switch products sold prior to November 16, 2016 contain a faulty clock component that is likely to fail at an accelerated rate after 18 months of operation.”

To improve my home wi-fi I just added a 4th access point. I can now have one access point go bad and the remaining three will cover the house. It is a luxury to have 4 access points, but one will go bad at some point. i can log into the access point controller to trouble shoot wi-fi.

The failed firewall and switch has me thinking more about redundancy.

At some point I may go for a complete redundancy for the firewall and switches which besides reducing the single points of failure it means I can do maintenance and network will not go down.