The first room-temperature superconductor has been created!
https://www.nature.com/articles/d41586-020-02895-0
OK, it's a bit of a chilly room, but still!
Unfortunately, it's not at room pressure. It transitions at 287.7 kelvin (14.55C) at 267 gigapascals (2.6 million atmospheres).
But it's still a marvellous achievement, and will almost certainly lead to greater understanding of the physics of superconductivity.
And with a bit of luck, it may even lead to room temperature superconductors that don't need to be kept in a diamond anvil.