How many lawsuits are filed but then not served intentionally (not from lack of being able to find the other party)? If the liability skyrockets there should b

How many lawsuits are filed but then not served intentionally (not from lack of being able to find the other party)? If the liability skyrockets there should be a decent number of cases where the suing party has a change of heart and does not take it to the next tier of seriousness. If there isn't the difference is without distinction. There is little incentive to use the filing as a seperate tactical step and then not try to serve or delay it (for the plaintiff). I'd say the filing is the start of the lawsuit for the plaintiff, the serving is the start for the defendant. Which makes the filing the overall start of the lawsuit. It is definitely not a mere threat.