Came here to say this. I was super surprised when I first found out that this came from Spy Kids.

Just made the switch at the end of December alongside making my new PC. Feels very refreshing to actually be in control of my own computer. I’ve barely run into any issues gaming either, which is a welcome surprise - Proton remains one of the best things Valve has ever done.

I think the joke is that people who don’t know how years work would think 4999 BC was before 5000.