It turns out, the gap between "works locally!" and "works in CI!" is not negligible, especially when you're not sure "about all that server stuff".
Getting this working locally with a fast cycle time, and then being able to easily move that into a CI environment of your choice sounds exciting to me.
Furthermore, the majority of our customer support is "I can't reproduce this locally but it's broken in CI". Everyone blames the CI tool, but it's almost never the CI tool - just drift between environments. A way to debug locally is a killer feature.
Is it worth an entire, funded company? I'm not sure, but I'm excited for them to exist!