I have a Ubiquiti setup for WiFi at home (though not as complex as in the blog post - just an EdgeRouter X and UniFi AC Lite). It has never gone down once, and performance is the same as on day 1:

  ubnt@ubnt:~$ uptime
   06:16:26 up 140 days, 13:15,  1 user,  load average: 1.08, 1.03, 1.05