Well you've WON the war, as far as I'm concerned !
Crimped connections are CHEAP and WILL fail. Sure ,in a controlled environment a PROPERLY crimped connection is 'ok' but NOT in the 'real world'. The ones where moisture is, where salty water is, where it gets hot and cold, where there's vibrations,......Once a copper wire turn 'greenybluish' it's compromised, needs to be replaced. Most 'copper' wire you'll see in automotive use is actually tinned, copper wire unlike the common household 14/2 you use ( pure copper..)
Yes, crimping is a mechanical 'connection', prone to several means of failure whereas soldering make the 'two' into 'one' and will not fail. I've yet to see any,even reasonably made, soldering joint fail, though I've only made 10s of millions of them over the past 6 decades.