For my own reference, I started on #Turtle at 5 (1986) and #Basic at 8 (1991), then C/C++ at ~11 (1994), Then #JavaScript when it was MochaScript, #VBScript (1996), realtime video apps in C++ (2000-2004), #CSharp (2005), and #PowerShell (2006).
I'm so old #ARPANet is (slightly) younger than I am.