I see problematic hardening at two different levels)

1) Putting NULL pointer checks (that result in early returns of error codes) in every damn function. Adds a sizable amount of complexity for little gain.

2) Wrapping every damn function that can fail with a “try 10 times and hope one works” retry loop. It quickly becomes problematic and unscalable. An instantaneous operation becomes a “wait 5 minutes to get an error” just because the failure isn’t transient (so why retry?).

Also becomes quickly absurd (gee, tcp connect failed so let’s retry the entire http request and connect 10 more times each attempt… gee, the HTTP request failed so let’s redo the larger operation too!)