The existing localhost implementations seem to have flaws. So I am hoping your experiment will offer a more stable foundation and make their visualizations more accessible. And a consolidated LocalHost seems like it would be more resource efficient.
One localhost example hides the local host admin. But Przemek Więch’s Topola-based Interactive Family Tree localhost is more vulnerable to blind failures. (It offers no diagnostic leads.): @PeWu
The other (the one with the extra technical admin up front) is the Deep Connection Graph has connection-diagramming addon by Kari Kujansuu @kku. Some localization and display glitches can make this experimental Dashboard gramplet frustrating and the Person selection is painful… but provides “connection network” visualization value that cannot be found elsewhere. And I have not seen other contributors developing “node-network” visualizations. (The Gramps export GEDCOM to yEd import visualization of family nodes is excellent. But the workflow is too complex for most users.)
I do not know if this is related. But another feature that has stagnated for years and is severely under-documented is the database Host/Port setup, found in the Database Location portion of the Family Tree tab of Preferences. It supposedly works in some OSes. But I do not recall anyone ever reporting success with it. That is probably why the wiki only has 2 sentences about it.