A modular dock. As thunderbolt moves forward or connectors change entirely, the dock would change. I could keep the same case for years, with only occasional minor changes. Likewise a Framework approved and designed modular EGPU, or better yet the dock can slide into the EGPU to provide most of the ports for it. Buy the dock, need an EGPU later, buy the dock for the dock. Take along one or both depending on need. Make sure the EGPU comes with a nice folding/hidden carry handle for easy transport.
Better yet use laptop DGPU chips as a module for the dock. Ultra-compact graphics dock. Skip the handle, full sized graphics card, and SFX power supply, or better yet make both to fill both needs, and make both EGPU modules compatible with the same dock.
How is that for some low hanging fruit?