Which is a pretty good argument for building a self-hosted Forth. You get a compiler and REPL suitable for commanding the computer in a package that will fit ea

Which is a pretty good argument for building a self-hosted Forth. You get a compiler and REPL suitable for commanding the computer in a package that will fit easily in the limited memory resources available. If you use threaded code with an "inner interpreter", it's possible to generate very compact code and fit a lot in a small space, or you could emit machine code directly ("subroutine threaded code") for speed.