As part of SDK story, user should be able to install/remove needed development dependencies into their sdk environment from published package feeds.
The dilemma here is whether we can use sstate in this process or we just have the package feeds? For various reasons the project has been tending toward using sstate rather than the package feeds directk.
sstate is possibility, but wouldn't solve ability to install build dependencies from custom user repositories. E.g. 3rd party software vendor to provide their own framework addons on top of main distro.
So we've implemented the basic functionality using devtool and sstate; without using package feeds directly. I'm therefore marking this as resolved for 2.0 and we can open new bugs for additional functionality as needed.
devtool and sstate does the job.