It really depends on the firm and what work they do. The firm I work for, we do not bill hours. We take a percentage of the recovered funds. It's high volume and many tasks are repetitive.

We don't have paralegals/attorneys handle cases from beginning to end. We have different positions handle different tasks. One person may only do scheduling, another does discovery, another handles reviewing releases.

For us, adopting tech to make us more efficient is a priority. Our setup is a bit unique, but I can see PI and collection firms adopting tech similar to this.