[xolox]

Both `find -exec` and xargs expect an executable command whereas `while read; ...; done` executes inline shell code.

Of course you can pass `sh -c '...'` (or Bash or $SHELL) to `find -exec` or xargs but then you easily get into quoting hell for anything non-trivial, especially if you need to share state from the parent process to the (grand) child process.

You can actually get `find -exec` and xargs to execute a function defined in the parent shell script (the one that's running the `find -exec` or xargs child process) using `export -f` but to me this feels like a somewhat obscure use case versus just using an inline while loop.