Both things are true. Musk's companies have done quite a few remarkable things people didn't think were possible, and Musk overpromises to an absurd degree and has left a trail of abandoned projects in his wake.
The new roadster is delayed, not abandoned. It's known to be in active development and is very likely to be demoed this year. Wrong timeline but not abandoned.
The Tesla semi is on the road daily and the factory to build large quantities is almost complete. They're hosting a "factory inauguration" event next month. Certainly not abandoned.
Tesla has already committed to replacing hardware as necessary on cars that purchased FSD in the past so that they can run unsupervised as promised, after Tesla has unsupervised FSD working. Certainly the timeline was wrong but again, clearly not abandoned.
New Roadster is over six years late and has basically gone silent at this point. Maybe it'll still come, just extremely late, but I'm very skeptical.
Semi might be real, we'll see.
If cars that were built with AP2/2.5/3 get upgraded to unsupervised FSD, I'll eat my hat. They don't even know what hardware will be needed yet and some of those cars are now a decade old.
Go ahead and count it as "abandoned" if you want. He did talk about building a Hyperloop and is not currently pursuing it directly. But I think failing to win required government approval/funding is a bit different than capriciously giving up on an idea, and The Boring Company itself is far from abandoned. Very different from the solar roof which is unambiguously a commercial failure.
TBC's continued existence isn't very relevant; the point was they/he have yet to build a lasting, full-scale hyperloop, despite his statement they would try. He stopped trying, and I'm fairly sure government approval is far from the only significant obstacle to making a functional and profitable hyperloop anyway.
I might even let go of the hyperloop concept, if they built something else of DC-NYC scale that beats the alternatives in a few measurements.