So, is it plausible? Okay. Yeah. Perhaps, if you're only using data sets from 2004 forwards. This phenomena has been going on at least since World War II, Foofighters were witnessed by many pilots. The 60s and 70s have multiple sightings over nuclear missile installations in the US and Russia, with apparent loss of control over missiles- which could have just been a fluke, maybe the missiles malfunctioned simultaneously with someone with a holographic UFO laser pointer, hiding in a bush somewhere... Did we have laser pointers in the 60s? Did we have mobile holographic projectors in the 60s? How big are the projectors that let people on stage dance with Michael Jackson? And holographs are just light, right? So that would explain pilots seeing things, but radar? Multiple sets of radar pinging in on objects going 120 knots at altitudes in excess of 20,000 feet- we have nothing that can go that slow at that altitude...

So, you lead with Occam's Razor. I love this. At what ponderance of the cumulative evidence does the simplest answer become 'it might be aliens' ??? Sometimes, the obvious, simplest answer is the thing you're trying to explain away. It doesn't have to be aliens. It could be a non-human, terrestrial intelligence invisible to us... An alien theory may be preferable to that? I think, you asked, an alien theory is reasonable conjecture. It should be on the table. I also think, and want, more data. I think some people have more data, and they're not sharing. And given Elon Musk's recent tweet, 'UFOs are real,' and knowing he has a foothold in space- and he was previously a skeptic- you got to ask yourself, what has he seen that changed his mind? UFOs in orbit? How good is that holographic projector? Occam's Razor, UFOs are real, confirmed by Pentagon, which is on record for saying not ours, not a secret black ops tech, and not a foreign adversary- you would hope they would know that, or at least ruled it out- and they are sophisticated enough to rule out lasers and weather balloons- so, what's the simplest go to explanation? Aliens.