I believe that Bin Laden probably feels he was 70% successful in his attacks.
If he were able to reflect on the past 8 years and determine if he would do it all over again, he would. Lets be honest, many things did not occur the way he, nor anyone else could have really predicted.
Its bad (for Bin Laden) that Afghanistan is no longer under the Taliban, Iraq is no longer under Saddam, and the eyes of the world’s military and police are now tuned in to Al-Qaeda and Islamic extremists.
However, its good for him that a culture war is firmly in place, Americans are less prosperous because of the war spending, freedom in the West is curtailed due to security and bigoted fears, and its easier to recruit followers because extremism on both sides have risen and seemed to have drowned out the moderates.
Does the good outweigh the bad? To me, it seems so because so much of the bad can be mitigated and so much of the good is really difficult to pacify. Pakistan is now the new Afghanistan, and Iraq served its purpose as a foundation for attacking Americans, training jihadists, and draining the coffers and will of the American people. And while the world now knows Al-Qaeda’s name, so too does the countless thousands of potential recruits.
To fight against the good (for Bin Laden), would take staggering amounts of patience, time, and money. How do you simply stop the culture clash that Bin Laden unleashed? Especially when countries lock up Muslims, torture them, ban their headwear, and generally make them miserable, whether justified or not, in their country of residence. The powers that governments grabbed in their haste to provide security will not be easily relinquished, if at all, and so that serves as another point for the pro-Bin Laden side
Sure there was a lot he hasn’t accomplished, but I doubt anything thinks that 9/11 itself was going to topple the Saudi kings or usher in an apocolypse on Israel. Those are tangential.