There is a famous paper on the perils of scripting in the csh. It is unfortunate that Bill Joy was not able to write a formal grammar or parser for his language. It was certainly a missed opportunity, and tcsh cannot fix the design.

That being said, csh advocates definitely influenced everything in the Bourne/POSIX family.

Why, it's a dinosaur? Have you tried nushell, murex, oil shell or xonsh?