Not abandoned but the idea of not using two of the most common engines is concerning, especially if it was floated that he may be thinking of his own. That would mean it's on hold for a VERY long time.
Even if not, the language suggests a desire to do it differently and with no quick solution it's effectively done. I'd be surprised if another release happens. Pleasantly surprised, but surprised!
Yet, he paused the charges so I don't feel any sense of a cash out situation or shady business going on. I hope he gets it going again!