Heh, actually it already reached that point, more than 10 years old I think.
From http://www.softwarebyrob.com/2007/04/19/interview-with-lutz-...
"Lutz: newLISP started on SunBSD in the early 90's, then moved to Windows 3.0/1 as a 16-bit application, then to Windows 95/98 as a 32-bit program. During all that time newLISP was more like a hobby for me. Around 1999/2000 I made it Open-Source under the GPL license on Linux."