not going to remove it, just move it, you will be able to use bash and zsh commands and scripts from the shortcuts.
I haven't read that anywhere, I have seen it in the keynote:
They said: shortcut is the future and it's just the start of a multi year transition starting with automator....and all three apps where shown on the background - yes they start with automator for now, but in five years there will be no terminal as we know it.
And no, I don't think they going to loose any customers with this move, as always everyone will adapt