I think one of the things that still make shell scripts so alluring is that it's the same language you use for your shell.
Many of my scripts for personal use were basically just cleaned up and slightly extended versions of the command sequences I typed in anyway. This is different from writing a script in a proper language where you usually start from scratch.
I believe, this was Perl's approach originally: Let you use your shell commands as a starting point and then gradually extend the code in a safer language. However, this still leaves you with many of bash's syntax issues.
On the opposite side, many modern languages do have REPLs - but I have not seen anyone so far use them as actual day-to-day shells.
So I think to really get rid of shell scripting, you'd have to develop some syntax that would work well both for scripts and for shell use.
Many of my scripts for personal use were basically just cleaned up and slightly extended versions of the command sequences I typed in anyway. This is different from writing a script in a proper language where you usually start from scratch.
I believe, this was Perl's approach originally: Let you use your shell commands as a starting point and then gradually extend the code in a safer language. However, this still leaves you with many of bash's syntax issues.
On the opposite side, many modern languages do have REPLs - but I have not seen anyone so far use them as actual day-to-day shells.
So I think to really get rid of shell scripting, you'd have to develop some syntax that would work well both for scripts and for shell use.