> Such single-type languages tend to be esoteric and/or difficult to program in, since every sort of data manipulation not supported by that type has to be done

> Such single-type languages tend to be esoteric and/or difficult to program in, since every sort of data manipulation not supported by that type has to be done at runtime, by the programmer. It depends; I recall programming in Tcl in the late 90s, and that has only the string and the list as datatypes, but it felt very powerful, like Lisp but without the easy syntax.