We used to use soldered connections but manufacturers prefer crimped connections because they are cheaper to implement. Crimped connections are not sealed by solder and are subject to dissimilar-metal corrosion.
With all due respect, I'd like to add that crimped connections, when done properly, are just as good (if not superior) as soldered connections in all respects, including resistance to corrosion. What's more important, crimped connections - again, using the right tool - are far more consistent, even when done by underpaid and ignorant personnel, which is often the case (hope that does not apply to Airbus).
Some years ago I was involved in a project which included installation of two different systems in a subway trains. One of the systems, done by "old school guys", was using soldered connectors throughout; the other one used crimping. Each system had a few hundred connectors per train, exposed to elements and quite a lot of vibration for many hours a day. Not a single crimped connector ever came loose, while soldered ones were keeping maintenance department busy for a long time after the systems were installed. But then, this is anecdotal evidence which (hopefully) does not apply to aircraft industry.
Connections can, and do, break down.
So very true.