You can still make some pretty significant things on perfboard with
point to point wiring.
Here is a packed mag-lev board with 4 IC's that still runs fine after
2 years museum use.
http://tesladownunder.com/Magnetic%20levitation.htm#Magnetic%20Levitation
Even more extreme is this completely point to point art piece. There
is no perf board, everything is point to point and supported by the
connections to the supply rail. Still works after 20 years. 8 IC's and
perhaps 100 components
http://tesladownunder.com/Electronics.htm#Pyramid
Peter