Would it matter if we answered questions that were created several days ago?
It depends more on you. Ask yourself these questions:
Are you answering the question to provide valuable and useful information to the user and it doesn't matter if it gets upvoted or not?
Are you answering the question so you could get an upvote from Musing?
Are you answering the question to provide valuable information as well as get an upvote?
If you answer these questions truthfully, I am sure you will find an answer.
It is not wrong to answer a question from weeks ago as long as it is valuable and useful. The user will still get a notification of a new answer nonetheless if they use Discord.