Expressions like are still prevalent in the wild.
If you work with shell script code that uses this deprecated code, you can do both your
colleagues and yourself a favour by replacing that with
for the following reasons:
Nesting is easier. Go figure out how to escape backticks in a nested expression.
This is highly error prone.
It’s visually more clear that we are dealing with at an expansion.
Handling of backslashes is consistent, as shown in here: