Myself. Forth it's easy, 9front C it's manageable but POSIX it's hell and managing both Unix descendants are a piece of cake.

GUI interfaces for the enterprise came from Dante's hell themselves. I hate them, they are like the Madhouse from that Asterix movie making satire of the European bureucracy of the day. The often are oddly designed and they are not documented at all, you must guess the meaning by chance of with a senior tutoring you.

The same with anything corporate from Microsoft with AD roles/group policies and the like. Or anything coming from IBM.

Trivial under plan9/9front. Under Win32/POSIX, run way.

On bit shifts, pick any Forth programmer and shaders will be almost like a toy for them. They are used to implement double numbers (and maybe floats) themselves by hand by just reusing the only integer numbers they have and writting custom commands to output these pairs of integer as double numbers. They can probably implement multithreading processing by hand in Forth and also know the IEEE standards for floats better than C programmers over 20 years.

GPG, as OpenSSL, are too huge and complex in order to use them on daily basis.

OpenBSD has signifiy, which works fine. But I wouldn't mind something like a cleaned up age(1) but without the mentioned issues.

GNU tends to stack features like crazy. It had sense over the limited Unix tools
in the 90's, but nowadays 'ls -F', oksh with completion and the like make them
decent enough while respecting your freedom and not being overfeatured.

LibreSSL did the same over OpenSSL.