Unfortunately, this shockingly happened to two of my favorite 4th generation rookie groups recently with Purple Kiss and PIXY.
PK has one less member and PIXY has two less members, but they [ PIXY ] already has a new member join the group because she went on tour with the rest of them for the past some months.
Did that change my stance in loving them less?
No. I can understand why some members decide to leave the industry because of the strenuous physical and psychological demand they were put through and ultimately they realize it is not right for them.
As for Girls' Generation's situation, that was surprising as well when SM and Jessica decided to part ways.
I still supported her solo music career by purchasing her albums and I did not love any of the members less regardless of how her departure occurred.