Dustified in flight in a flash of energy.
Little if anything survives physically - no ocean debris.
And it was witnessed:
Oil Rig Worker Says He Saw Flight 370 Crash in Flames
My theory is that it was hijacked and already carrying a nuke, headed for the closest biggest city - Singapore - which was less than 45 minutes away flight time. If any missile assets were available, they could trigger the nuke through a deadman's switch or through shockwave, or just vaporize the plutonium and make a de facto dirty bomb. Plus it would take time, and there was no time. So missile options were bad.
Therefore, Zap.
And now, since such weapons can't be admitted, the vanishing plane concept is being normalized. And that's all there will ever be - a mystery.
You sound like you live in New Mexico.
With Sandia and Los Alamos Labs here, we get whispers of all sorts of good stuff.
As one of the lab rats told me, “Think of where you think we are...add 100 years...and you still might not be close.”
Your theory is as good as any.