Kinda true, kinda not. The idea was to replace CAHSR, but CAHSR is itself billed as a replacement for flying.
Personally I think the Hyperloop proposal is done in bad faith - the system Musk proposed was supposedly substantially cheaper, but only served two of the four cities joined by CAHSR, was something in the region of a hundred miles away from those two cities, couldn't carry anything like the same number of passengers, and Musk hand waved quite a bit about costs (did he really think the CAHSR people hadn't considered viaducts? And in what world does a viaduct - even for a single pipe stuck up on stilts - cost only a quarter of a million dollars a mile?) suggesting it would probably cost several times the amount Musk proposed.
And, I'll be honest, I think travel in those things will be a nightmare. But I'd expect nothing less from anyone in the car industry - these are people who have never "got" public transportation, largely because they love driving so much they can't imagine anyone else wouldn't.
It isn't a problem, and the installer need take no special measures. The system's loader restricts the search path for dynamic libraries when it's running with elevated privileges so you don't accidentally run an infected library in some random location (for example, the download directory).
There are also techniques available to load libraries from a specific path after the program starts rather than at load time. You can use that to choose a specific full path to the exact library you want to load and it still counts as dynamic linking.
SCCS, the source motel! Programs check in and never check out! -- Ken Thompson