Phil Muldoon started a Frysk blog:

I’ll have to admit that before I joined the Frysk team, I did not think much about Execution Analysis - or Debugging - or really any of the thorny, tricksy issues that now dominate my thoughts. Back then - before I looked behind the curtain - a breakpoint was something to be set; a register peek was just that, and stack traces were supposed to just happen. Debuggers, and I use that term carefully, were tools - just like compilers, editors and profilers. Something you used, but rarely thought about. Carpenter and chisel. Bricklayer and trowel. And they (these tools) were supposed to just work. I was wrong.

I couldn’t have said it better :)