Agree with the main thrust of this article - Excel is an amazingly successful platform for end user developed software. Once a .xls[x] has even one worksheet fo

Agree with the main thrust of this article - Excel is an amazingly successful platform for end user developed software. Once a .xls[x] has even one worksheet formula, it's a program. However, IMHO the major flaw is that there is no separation between dev env and runtime; they are one and the same.