Most things now can be precisely modeled and scheduled, and sold as services

Frequencies and directions and timings can be precisely modeled. Whether in solids, liquids, gases or plasmas. I am not sure why you treat it as something unusual. You decide what you want to use, what modes to grab, then you program it and the computer makes it happen. Information is a form of energy and time saved. I just hope you use it for the good of all, not more “look what we can use for our own benefit only”. When you use fields (no obvious strings attached) so things move precisely as programmed, and produce motions, velocities, accelerations, jerks and higher derivatives. That is not not magical or “anti-gravity” – just good information and model management. Work out the gravitational potential and velocity changes and energies needed to get the SpaceX second stage to its initial height, direction and velocity. Model the acoustic, flow and electromagnetic fields needed, and you do not need the second stage. Ground based or and remote field generators with frequencies, directions and timings to do the job.

Air has very specific states and vibrational modes. The rotational-vibrational, rotational-translational, floppy-rotational, electronic, magnetic, and stress modes of billions of nano-regions can be grabbed by their states. Tiny materials can be tuned just like the old days when transistor materials were made, tested, classified and sold according to the properties they have, even when what you make is not exactly what you planned. Lots of things work very well, even when they are not planned. Characterize them at all scales, post the properties clearly, do not make everyone guess. Do not exaggerate or lie. 3D printing a rocket motor is not unusual, it is simply a service that can be provided, that now has a global and later a heliospheric market. Many times now trading services is much cheaper than using money.

Use your “floppy modes” to serve the human species, not for evil.