As a 2A371 (C for what it's worth), I support this message. Although I've not touched an A-10, honestly it's amazing that F-15Es don't explode in midair or flip over off the runway, careen into the ramp, and blow up everything else. Pilots literally end missions carrying bits of the cockpit with them, and a 12-turn-8 typically ends with fifteen or more writeups, most of which aren't the 'sign it off' kind (up yours 'display too dim in night mode').
That said, if they're simulating a failure as being 'working 100% or totally inop', that's wrong. I seriously would love to see real failures simulated. For example, rather than your HUD going out, it experiences a video failure that makes all the stroke video blurry, or maybe it's scrunched on one side. An ADP failure on an F-15E can induce all kinds of crazy bullshit like Pitch Ratio warnings. Buttons get stuck, display lines blank out, and partial functionality is the norm. You might get TACAN bearing, but no range or distance. Your radio works fine, except it produces an irritating squeal every time it's keyed...