For some reason he think it's the epitome of AFV development, despite the fact that pretty much everyone is getting rid of it has soon as they can afford a replacement.
Yeah, it truly is bizarre. For that matter, if it truly is the epitome of AFV development, why would replacements be developed in the first place?
Sparky had some good ideas, and then rapidly fell into madness by believing his own hype in extremes not seen since L. Ron Hubbard. The M113 is an example of this - yes, it's a little more air-portable than similar AFVs, but then he started to really dive off into the hype he himself created for it. And he's honestly the only person who believes it at this point (at least, God hope so).