When trialling t4c at $work I've had a lot of complaints about the number of different packages and modules that are needed for the core functionality. Here are a few tentative suggestions for reducing barriers to adoption:

modules

• combine model into kernel
• combine exporter-common, base and inject into core

packages

• move contents of model and inject packages into either the base package or trace and span packages
• move contents of kernel package into either the base package or a span package
• consider changing the base package from io.janstenpickle.trace4cats to just trace4cats

Any thoughts on this?