Easily. 600 is well within reach as well.
It's a shame, really. Even a relatively un-injured Stamkos would've had a real chance to get to 700 and top 10 all time.
It really is a shame that injuries derailed a pretty big portion of his prime, starting with that injury in 2013 when he was legitimately looking like the best player in the world and a shortened season removed from his 60 goal year.
Considering he missed about 150 games between the 2013-14, 2016-17, 2019-20, and 2020-21 seasons, it's very reasonable to say he could've scored 57 more goals to be at 500 already. That's nearly two entire seasons worth of missed time for a guy that averages almost 43 goals per 82 games.