That's not that important. What is important is that if it is true that this is the first member of a new class of superconductors, a whole new family if you will and that once the principles are better understood materials scientists can go about their search in a smaller parameter space of which they have proof that at least one set yields results.
Compared to the steps that have been happening in the last decades this one would be absolutely incredible in terms of temperature range, if I understood it correctly they aren't even sure about the upper limit due to a restriction in their measuring gear.
On one hand, yes, a new family will be discovered. On the other hand, high temperature superconductors like YBCO are very brittle and it does limit the applications. Traditional liquid helium-cooled superconductors still have to be used in many places.
One of the reasons it is so brittle is because it is still very cold even though it is high temp for a superconductor. Many materials will become brittle when cooled down that far. This is one of things people hope for with higher temp superconductors: that they will be less brittle. But less brittle usually also implies that a material changes shape easier and that in turn may affect the superconductivity. For instance when a large current runs through a superconductor that leads to strong magnetic fields and those strong magnetic fields will actively push against each other trying to destroy the conductor. A non-rigid superconductor would behave in ways that are not really helpful for instance by pushing it out of its superconducting domain (which would result in some pretty spectacular fireworks because suddenly all that power is available to heat up a small segment of the no-long-superconductor). So there is some chance that all materials that exhibit (useful) superconductivity will end up being somewhat brittle, and will need to be mechanically re-inforced.
Compared to the steps that have been happening in the last decades this one would be absolutely incredible in terms of temperature range, if I understood it correctly they aren't even sure about the upper limit due to a restriction in their measuring gear.