The development and compiling apps are modular in TC 2.x by design, as well as having been migrated to /usr/local. But there is discussion of making a "compiletc" meta extension that would install commonly used compiling extensions as dependencies, probably a similar set of apps that is in compiletc in TC 1.x for familiarity. That way hardcore folks can choose to only install the essentials of what they need in a development environment and others can have a "one click" install of the commonly used compiling apps.