You are using Eclipse technology as an underlying platform for your business critical applications.
You or your customer are using the solution for years. Then your system breaks due to a bug in the underlying Eclipse components, due to a new feature, an operating system upgrade or some other reason.
Now what? Eclipse code is open source. You can either fix the code yourself (which isn't really easy), rely on the community or ask others for help and support. This is where the Long Term Support Initiative comes into the picture.