In the Tempest In a Teacup article, the authors seem to have never heard of wake turbulence from aircraft which produces wake vortices in air far from any boundaries and these wake vortices last several minutes before decaying. Wake turbulence and the resulting wake vortices have been studied in flight tests and in wind tunnel tests for many decades.
In the experiments discussed in that article, the ball of turbulence was produced in water, not in a plasma. The molecules of water are neutral, whereas the constituents of plasma are charged. Thus, the configurations used to produce the water turbulence ball may not be applicable to forming a plasma turbulence ball.
Although the article "Pair plasmas found in deep space can now be generated in the lab" says near the beginning "An international team of scientists has developed a novel way to experimentally produce plasma 'fireballs' on Earth," if you read further into the article, you find that they have created beams of electron-positron pairs with densities similar to those found in the deep space plasma "fireballs," but they have not yet created such plasma "fireballs."
The article specifically states "Now, for the first time, an international team of scientists, including researchers from the University of Rochester's Laboratory for Laser Energetics (LLE), has experimentally generated high-density relativistic electron-positron pair-plasma beams by producing two to three orders of magnitude more pairs than previously reported...In other words, the beam they generated in the lab had enough particles to start behaving like a true astrophysical plasma." The MARAUDER concept needs a confined volume of plasma, which is then launched at the target with the plasma remaining confined during launch and transit to the target. That's very different from a beam of plasma.
An electron-positron plasma beam might make a formidable directed energy weapon for use in space if it could be made to work in a compact, low enough mass configuration to be put in space, but the electron-positron beam would not propagate through the atmosphere.
For a kind of "plasma beam" weapon operating in the atmosphere, perhaps a better choice may be the electrolaser:
https://en.wikipedia.org/wiki/Electrolaser "An
electrolaser is a type of
electroshock weapon that is also a
directed-energy weapon. It uses
lasers to form an electrically conductive
laser-induced plasma channel (LIPC). A fraction of a second later, a powerful electric current is sent down this
plasma channel and delivered to the target, thus functioning overall as a large-scale, high energy, long-distance version of the
Taser electroshock gun...Because a laser-induced plasma channel relies on ionization, gas must exist between the electrolaser weapon and its target. If a laser-beam is intense enough, its electromagnetic field is strong enough to rip electrons off of air molecules, or whatever gas happens to be in between, creating plasma." See also
https://www.army.mil/article/82262/ and
https://www.bbc.com/news/technology-18630622