Yeah, exactly!
And even then, they never really brought that up again after the first episode or so. It's the fans who kept reiterating that.They kind of wrote themselves into a corner with Zeo where Zordon claimed the Zeo Crystal that provided their powers was a source of perpetual energy that would only get more powerful. The Zeo powers in theory could have just been what they had forever.
And they didn't even try to say they got destroyed in Turbo. They just...have cars now.