Brown dwarf planets

Are brown dwarfs failed stars or are they Jupiter and Saturn like planets?

Brown dwarf planets, not ultra cool dwarf (star) Jupiters (planet)?

Sometimes a brown dwarf is actually a planet—or planet-like anyway. A team … discovered that what astronomers had previously thought was one of the closest brown dwarfs to our own Sun is in fact a planetary mass object.

… “This means that the temperatures of brown dwarfs can range from as hot as stars to as cool as planets, depending on how old they are,” said the AMNH’s Jackie Faherty, a co-author on this discovery.

… The implication that the well-known SIMP0136 is actually more planet-like than we previously thought will help us to better understand the atmospheres of giant planets and how they evolve,” Gagné said … “This newest addition to the very select club of free-floating planetary like objects is particularly remarkable, because we had already detected fast-evolving weather patterns on the surface of SIMP0136, back when we thought it was a brown dwarf.”
Surprise! When a brown dwarf is actually a planetary mass object

That is a lot of Jupiter and Saturn gas giant like planet systems out there.

Brown dwarf binary systems are giant gas planet binary systems?