Most OSes no longer have any users or squeak by with less than 1000 users on their best day ever: Plan 9, OS/2, Beos, AmigaOS, Symbian, PalmOS, the OS for the Apple II, CP/M, VMS, TOPS-10,
Multics, Compatible Time-Sharing System, Burroughs Master Control Program, Univac's Exec 8, Dartmouth Time-Sharing System, etc.
Some of the events that help Unix survive longer than most are the decision of DARPA (in 1979 or the early 1980s IIRC) to fund the addition of a TCP/IP networking stack to Unix and the decision in 1983 of Richard Stallman to copy the Unix design for his GNU project. The reason DARPA and Stallman settled on Unix was that they knew about it and were somewhat familiar with it because it was given away for free (mostly to universities and research labs). Success tends to beget success in "spaces" with strong "network externalities" such as the OS space.
>Getting this back to the OG point
I agree that it is easy to avoid writing shell scripts. The problem is that other people write them, e.g., as the recommended way to install some package I want. The recommended way to install a Rust toolchain for example is to run a shell script (rustup). I trust the Rust maintainers not to intentionally put an attack in the script, but I don't trust them not to have inadvertently included a vulnerability in the script that some third party might be able to exploit (particularly since it is quite difficult to write an attack-resistant shell script).
Some of the events that help Unix survive longer than most are the decision of DARPA (in 1979 or the early 1980s IIRC) to fund the addition of a TCP/IP networking stack to Unix and the decision in 1983 of Richard Stallman to copy the Unix design for his GNU project. The reason DARPA and Stallman settled on Unix was that they knew about it and were somewhat familiar with it because it was given away for free (mostly to universities and research labs). Success tends to beget success in "spaces" with strong "network externalities" such as the OS space.
>Getting this back to the OG point
I agree that it is easy to avoid writing shell scripts. The problem is that other people write them, e.g., as the recommended way to install some package I want. The recommended way to install a Rust toolchain for example is to run a shell script (rustup). I trust the Rust maintainers not to intentionally put an attack in the script, but I don't trust them not to have inadvertently included a vulnerability in the script that some third party might be able to exploit (particularly since it is quite difficult to write an attack-resistant shell script).