However not all... there are antennas that are tuned to a length of line. (don't ask how I know this) This is not likely in this GPS antenna case BTW.

It could be the case for a cell phone external antenna or a radar antenna.

And there are instances when a barrel makes sense, such as for a mast antenna that needs to "break" at the deck.

But otherwise, cut the cable to length (leave a service loop) and then put on the new connector.