

Yes. Every now and then we get a paper claiming that they found a HTSC. It always is a big deal because they are considered the holy grail of solid state physics. Later we find that it’s a mistake.
We are pretty good though. Records are in the area of −135 °C (138K, -211°F) but the phenomenon was thought to be at a few Kelvin max in the last century.
The big BUT is that it’s science. Meaning that it is not granted that such a material (superconducting at ambient temperature and pressure) even exists
I always wondered what would happen if you cite an original source of something we consider common sense now. What would nature say if you use conservation of momentum and cite Isaac Newton and the Principia Mathematica.
What if you quote something in latin. For most of science history this was completely normal.