Yes, shapefiles are of interest! Traditionally, the 2 types of data we’re most interested in has been roads and addresses. The first issue to get past is licensing; is the data available under an ODBL license?

Other types of shapefiles are useful - such as those that define areas. But they’re much harder to import correctly. The OSM community is very strict on proper topological connection to existing OSM data - no delete and re-import, and having correct topology in respect to other feature types.