At least with a stuka bomb strike you can dodge it if you move your infantry or retreat, you can't retreat a tech building.
You can't retreat a static artillery piece either. I can't retreat bunkers, fighting positions, or flak emplacements I build on the map. I can't retreat a cache. You'll reply that none of these things are tech structures and that's true, but this distinction is not really as important as people are making out. OKW tech structures are at risk of blowing up in the wild, which is not the case with any other faction. The question should rather be about whether the ability is too effective or too cheap, not whether it's too easy. It would be small comfort to know that your flak HQ was blown up by two time on target barrages being cast simultaneously by two players in a team game, which would require only about 1% more effort and 0% more skill than casting Air Supremacy Opreation does.
Does ASO automatically kill trucks? I'm not so sure about this, since I'm pretty sure I've seen trucks survive the ability. I have also seen it instakill trucks, so it's definitely something that happens too. The question of whether it's OP in general is debateable. If the Brit player gets to ASO it will severely punish people Leig spamming behind their Schwer and med truck. They will be forced to uproot and will likely lose their truck. Fair for the price and delay? Not sure. In a 1v1 context I don't think it's unbalanced, although I've already commented that it has too much synergy in team games when it can be combined with other abilities too. I don't think it should be touched in the next patch though, because various imbalances are being masked by other imbalances in the complex, interlocking series of horseshit that is the current state of coh2 balance. Brits are definitely not overperforming in the meta right now overall.