In my last update, I noted that certain Droplets in fact already used their own bootloaders and "internally managed" kernels. I'm glad to say that these changes have been backported to other distros as well. All new Droplets now use their own bootloader.
We've also provided an upgrade path for older Droplets. In order to use the "internally managed" kernels without rebuilding your Droplet, you can now set the "DigitalOcean GrubLoader" from your Droplet's kernel menu.
You can read more about how this works in this tutorial:
If you have any questions about the changes, please open a support ticket so the team can clarify any concerns you have.