Now that The Crown is over, Netflix may struggle to reach that level of prestige television again. The Crown won Netflix Emmys, which other original series failed to do, and will only do so again if Peter Morgan chooses to do a prequel or sequel series. But in reality, The Crown dipped in quality and viewership as the series progressed, falling to its own glory.
Source:https://www.cbr.com/the-crown-seasons-ranked/