Airships can lift a shit-ton. Sure, they're "lighter than air" but they're still massive. Thing of it is, though, they're still one bad storm from destruction. Every Navy airship of the WWII era died in a storm.
The one thing that's changed from the '30s is that helium is becoming harder to come buy. I know a guy who had a DARPA project that, for liquid cooling, used all the commercially-available research helium. Since it was an Iraq War project he got it but... in a future where everything needs to be super-cooled to be fast, you have to ask yourself how much helium you want to put into blimps.