A POSIX shell occupies a special role in scripting. It embodies great power in a small space.

  $ ll /bin/dash /bin/bash
  -rwxr-xr-x. 1 root root 1388920 Jan 23 12:16 /bin/bash
  -rwxr-xr-x. 1 root root  128608 May  9 22:26 /bin/dash
  $ cat /etc/redhat-release 
  Red Hat Enterprise Linux release 9.2 (Plow)

Dash is the Debian/Ubuntu system shell, which supplanted bash sometime ago. You will not find comparable speed and power in that economy of size anywhere else.