The trouble with crimps is that to do them "right", you need a crimping tool that is expensive.
Another issue has to do with making sure that all wire strands are part of the electrical connection.
There are pros and cons to both crimping and soldering.
In the past, I've even used Mil Standard connectors that were intended to be initially crimped,
then heated so that internal solder rings melted, and the outer insulation shrank.