In the real world nothing is perfect. You are betting your life on the
fact that a crimp is perfect as well. Most (not all) solder terminals
have some sort of minimal mechanical connection to hold the conductor in
the terminal until it is soldered.

In Military aircraft, (some years ago in my experience) only soldered
connections were approved. Only stranded wire was used, and a clip-on
heatsink was used on a small (say 1/8 inch on #16 wire) area just
outside the lug, so solder could not 'wick' into the rest of the
stranded wire, which would degrade the vibration resistance of the wire.
Inspectors had to see the soldered connection before sleeving was
applied over the wire end and lug.

Initially I thought this was a little over-conservative. Then I
realized it was my friends from High School who were flying those F4's
and at 500 MPH close to the ground those connections mattered.

--
Regards, Terry King ...In The Woods In Vermont

"The one who dies with the most parts LOSES! What do you need??"