I skimmed it very quickly, but quite a bit of that 'defense' of Tcl seems to be assuming that the problem with "everything is a string" is performance. It isn't

I skimmed it very quickly, but quite a bit of that 'defense' of Tcl seems to be assuming that the problem with "everything is a string" is performance. It isn't. There are very good reasons that stringly typed programming is frowned upon and 'performance' is very seldom one of them. There's also seems to be a weird assumption that everthing-is-a-string means that you don't have to think about types. It's actually the exact opposite since now you don't have types for the compiler/runtime to help you to combine values in well-defined ways. (I realize that the thing was written ages ago and we/the author may have learned a thing or two in the mean time.)