Those who believed that this innovative company would skyrocket into the stratosphere have been sorely disappointed so far.Taking flight with a stock shortly after it debuts on the public markets can be an endeavor fraught with risk -- something that early investors in Joby Aviation (JOBY 0.80%) could probably tell you from firsthand experience.Instead of a traditional initial public offering (IPO), Joby Aviation, a developer of electric vertical take-off and landing (eVTOL), first spread its wings on the p ...