What is the difference between 'their daily life' and 'their daily lives'? Are they interchangeable?
The reason I didn't provide context is that I would like to know if you native speaker perceive the two as the same or not.
The reason I didn't answer your question was because it's impossible to do so without context.
It's illogical for an author to use "life" in one sentence and "lives" in the next, when the sentences are essentially the same.
If you search on "distributed plurals" you'll find a lot of comment on this. Each of us has one life, and only one life, so no confusion will result, no matter which one you use. However, you should use the same one!
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