curl get.pharo.org | bash
./pharo Pharo.image config URL PROJECT VERSION
./pharo Pharo.image http --start 8080
then they can reproduce last line as much as they want:
./pharo Pharo.image http --start 8081
./pharo Pharo.image http --start 8082
etc.
But my point was that if someone has started "./pharo Pharo.image .." on a production service and modified it live, then it'll be a problem (what if you haven't saved, or your changes were not propagated yet to the source version control system?) - also how this would propagate changes to other slave machines running it there too?
But it's pretty cool and advanced when developing the system. I'm now stuck a bit with Java/GWT, and I'm glad that there is SuperDevMode which incrementally compiles java->javascript (and few other things). Still its far away from Ctrl+X+E on your block in Lisp.
I know this is not the point of your argument. I agree with it in fact.
But there is no sysadmin in the world that I have met who would not wig out at that part. This is the difference between me, free-wheeling tinkerer and Linux enthusiast, and sysadmins who build infrastructure for verified systems. You are just proving their point.