i am 1 of those people who are mostly against crimps/butts.
this is how any wire joining should be done when you are unable to make a new run of wire the exact length you need it. Lineman’s/NASA type soldering. this joint will NEVER come apart. this is essentially stronger then the wire itself. If pulled on or tugged, the un-soldered part of the wire will be the first to break, not the solder joint