I suppose this, again, depends on the country. They can get very expensive, especially if you're in a "loser pays" country. And a judge may even then divide the costs more fairly, and you find that your lawyer costs exceeded the monetary value of the judgement you won. That on top of potentially stressing years and years about it.

And then the loser may request a next level court to consider the case, potentially leading to more stressful years and a lot of additional financial risk.