  The Key4hep project aims to provide a turnkey software solution for the full
experiment lifecycle, based on established community tools. Several future
collider communities (CEPC, CLIC, EIC, FCC, and ILC) have joined to develop and
adapt their workflows to use the common data model EDM4hep and common
framework. Besides sharing of existing experiment workflows, one focus of the
Key4hep project is the development and integration of new experiment
independent software libraries. Ongoing collaborations with projects such as
ACTS, CLUE, PandoraPFA and the OpenDataDector show the potential of Key4hep as
an experiment-independent testbed and development platform. In this talk, we
present the challenges of an experiment-independent framework along with the
lessons learned from discussions of interested communities (such as LUXE) and
recent adopters of Key4hep in order to discuss how Key4hep could be of interest
to the wider HEP community while staying true to its goal of supporting future
collider designs studies.
