I know that "terminal spike" sounds, well - terminal, so I thought I would share this guy as evidence as to why you don't need to trash your Phal after it has gotten a terminal spike
This grew a terminal spike two years ago (along with a normal spike). Later that year, it started a new crown just below the original. I don't know if this "new crown" would be considered a basal growth/keiki ?

The following spring, it spiked normally, and has done so again this year.
In the second pic, you can see the remains of the terminal spike, and the basal growth that came up just below it to the left.
So, I'll have to wait and see what it may do in the future, but for now, it's still growing and blooming
