k6 is a very light weight tool to help get started with performance, but at the same time have extensive tooling to scale towards complicated scenarios.

K6 is great for getting actual data on how your application is performing and can tell you exactly what your metrics and baselines should be. This is vital to any sort of SRE based organization.

The best thing regarding k6 is that the learning curve is not steep. You can create a serious load testing solution within hours. Besides simplicity, you can generate thousands of virtual users from a single machine. k6 supports hybrid load testing out of the box.