As far as I know, they have issues if those apps download external code and then execute (which makes entire classes of applications impossible). However, I kn

As far as I know, they have issues if those apps download external code and then execute (which makes entire classes of applications impossible). However, I know of at least one application where all the game logic was built with Gambit Scheme. The scheme code was compiled to C and then embedded. One could theoretically open a remote REPL over the network and issue commands, but that feature was disabled before release. Is that an 'execution environment' or 'interpreter'? The binary contains both.