Both of these companies have plenty of room to grow.If you had invested in either Netflix (NFLX 0.08%) or Shopify (SHOP +1.02%) a decade ago and held on, you would have earned outstanding returns. Both companies have significantly outperformed broader equities since 2015.And here's the best news about these market leaders: They still have significant room to grow in their respective industries and boast outstanding moats that will help them, once again, deliver superior returns through 2035.Let's take a clo ...