What to do with an old Dell

Hey folks,
Looking for an idea as to what i should do with a very old retired Dell box.
Its an Inspiron 660. 8GB of memory.

I already got a NetGate 6100 and a HP server tower thats very beefy running Graylog,Unifi controller,Bitwarden,Adguard and some other work related tasks.

So im thinking, install Ubuntu, EveBox and Suricata. Have my Unifi switch port thats facing my WAN, mirror port that, and send the copied traffic to the Dell.
Or if you fine folks can think of something i would love to know

Even better for that project would be running https://securityonionsolutions.com/