WARNING: This article contains major spoilers for Better Call Saul season 5 finale. Read at your own risk.
Kim Wexler becomes completely different in Better Call Saul season 5 finale, so there could be huge changes with her life moving forward. It seems like she has already reached her boiling point, thus the change. She's the one who suggested to ruining Howard's career, almost surpassing Jimmy McGill's crazy ideas. But the question now is: why did Kim change?
In Better Call Saul season 5 finale, Kim and Jimmy want to completely destroy Howard, and Kim is the one who's intent for it. Perhaps, this is a sign that she's now going to the dark path and she is losing herself. The sudden change might be surprising, as it looks like Kim wants authority over her life and she's willing to do that even if the process makes her a different person.
Showrunner Peter Gould discussed to The Hollywood Reporter about Kim's change, noting she wants to feel that she isn't a passenger. The character wanted to feel and know that she's the captain of her own ship. Kim also has pride in herself, as well as in her ability -- she can take care of herself and make her own decisions. Gould also explained the character doesn't want to be played as she wants to be the player.
And since Kim embraced her dark side in Better Call Saul season 5 finale, there could be consequences coming along the way. Gould said that since Kim is now steering her own ship, she must take responsibility for where she's steering. Moving forward, the character will completely be different and it's interesting to see how her story continues now that she's changed.
There were previous speculations that Kim may die or disappear from Jimmy's life in Better Call Saul season 5 finale, given that the character wasn't present during the Breaking Bad timeline. But then, that didn't happen as the episode feature something different. She suddenly changed and it looks like she's now moving in a different direction.
As for what else happened in Better Call Saul season 5, Lalo is still alive and can now run around and cause chaos. He turned completely different in the finale as well, hinting that he'll probably become an enormous villain entering season 6. He wants his opponents to think he's already dead, so he could unexpectedly strike at them and do whatever he wants.
