add advantage

proposals/003-post-tofu-world.md

@@ -32,6 +32,12 @@ that `LEAP` was conceived as a multi-service platform.
 
 ## Consequences
 
+Advantage: no need to provide the `CA` for `TLS` verification (we still need to
+provide the `CA` for authenticating the OpenVPN server).
+
+Disadvantages: dependence towards `LE`. Although, given the several order of
+magnitudes difference in funding, this might be also considered an advantage.
+
 ## Related proposals
 
 See also `002-vpnweb-deprecation.md` for a proposal about deprecating `vpnweb`