Lager is a development and testing tool for embedded systems engineers. Its key feature is eliminating the need to be co-located with the hardware (it cuts the proverbial cord). This unlocks two major advantages for teams:
Hardware in the Loop (HiL) test automation that can be easily scripted and dropped into a CI system like GitHub Actions or Jenkins.
For new users, Lager can be a bit disorienting, a bit like letting go of the steering wheel for the first time after engaging auto-pilot. But once acclimated, it's hard to imagine any other way to develop. With Lager you literally can do more from your couch with a laptop than if you were in the lab.