Hot code reloading and static typing are not incompatible.
On a trivial level, C and C++ can unload & reload DLLs at runtime. On a less trivial level, I believe the Yi editor, written in Haskell, can do hot code reloading. On a practical level, I use the XMonad window manager, whose configuration involves modifying a Haskell source file (the main one, actually), and hitting some shortcut. If my modifications are correct, the whole things reloads without loosing any state (my windows are still at the same places).
On a trivial level, C and C++ can unload & reload DLLs at runtime. On a less trivial level, I believe the Yi editor, written in Haskell, can do hot code reloading. On a practical level, I use the XMonad window manager, whose configuration involves modifying a Haskell source file (the main one, actually), and hitting some shortcut. If my modifications are correct, the whole things reloads without loosing any state (my windows are still at the same places).