  This article presents a streamlined version of the author's original proof of
the $C^0$-inextendibility of the maximal analytic Schwarzschild spacetime.
Firstly, we deviate from the original proof by using the result, recently
established in collaboration with Galloway and Ling, that given a
$C^0$-extension of a globally hyperbolic spacetime, one can find a timelike
geodesic that leaves this spacetime. This result much simplifies the proof of
the inextendibility through the exterior region of the Schwarzschild spacetime.
Secondly, we give a more flexible and shorter argument for the inextendibility
through the interior region. Furthermore, we present a small new structural
result for the boundary of a globally hyperbolic spacetime within a
$C^0$-extension which serves as a new and simpler starting point for the proof.
