One other thing that has been discussed lately is being able to discover libraries that are not currently loaded but are available (on user's system or in current edition).

Perhaps this new facility could give us a way to query either currently loaded libraries or additionally also all libraries that are available to be imported. This will allow us to move towards not importing all libraries in the default GUI project but only the basic stuff (Base, Table, Database) and being able to add additional imports on demand. The full ability to do this will require co-ordination between engine, libs and GUI, so it probably requires additional design. But I'm noting this requirement here so that we can take into consideration that listing all 'available' and not necessarily currently loaded implementations of an SPI is one of the things that we may need in the future, so it would be good if this new facility was prepared to handle this.