It's a fair point on a technical perspective, but I wonder: why are we allowed a hundred "friends" to begin with? I'm lucky to have six ACTUAL friends on my Steam list! Not, you know, "I met you online and you didn't suck at TF2 and you didn't act like a douchebag, so you get friended" material - ACTUAL friends.
People I talk to every single day. People I've worked with. Family members, in some cases, even. SIGNIFICANT people.
So yes, while I do agree that the Friends list is a fitting metaphor for the lack of innovation in modern gaming, that isn't really what I'd call a glaring issue. Jim is fairly lucky - nay, blessed - to consider that he's forced to deny friend requests because he's hit a software cap I will NEVER in all my life even come remotely close to approaching.
As for companies not being innovative - big shocker, right? Gaming's all about shareholders and profits and Scrooge McDuck money pits, now. Why risk anything if that means your six-figure villa in Baja is at stake? Why risk anything when the industry proves us time and time again that what people "like" is brown, gritty modern military shooters?
The only folks who can risk it are those who have everything to gain and nothing to lose. Independent devs, for the most part. Young and small upstarts who need to actually innovate to be seen in the grey, formless mass which is the current market.