The crimp termination style means the housing is re-usable if a terminal is damaged during assembly, but the terminal must be fully seated and the latch lock engaged for the rated retention.
No obsolescence or last-time-buy notice is on record. There is no direct second-source cross-reference from TE; the 1-1644055-3 is a different-pitch (6.35mm) member of the same series and is not a footprint swap.
