[optimalsolver]

StupidStackLanguage also has this pleasing property:

https://esolangs.org/wiki/StupidStackLanguage

[metadat]

Wow, some of those programs are actually interesting, I want to try cat (implemented as simply "jf"), and some of the other ones further down the list.

I almost can't believe this is my first time encountering StupidStackLanguage.

[29athrowaway]

The high amount of operators makes it harder to mutate the program iteratively into something that does what you want.

[stephen_cagle]

Is every program valid? What if the "end loop" occurs before the "begin loop"?