Well written, researched and composed, Ella.
I’ve kept an eye on EmDrive and Ionic Propulsion solutions (possibly the two most promising non-fuel/limited fuel intrastellar propulsion solutions to date).
I can’t help but think we are missing something hiding in plain sight.
Research is often stuck in the 90/10 paradigm: We drill down deeper into what we know, rather than scrapping it for radical flights of fancy. (Not magical pseudo-tech, mind you. But the sorts of advances we are now making in solid state battery technologies as a result of the, say, the discovery/invention of graphene).
Amazing how a single atom. Or, say, a sheet of single carbon atoms in a hexagonal lattice, can make all the difference in the world.
Looking forward to your updates to this. Your writing is exceptional. Easy to access. Has inherent velocity. More so than even an EmDrive.