I am curious why you think the demarcation is not decentralization vs. centralization (you don't share my interpretation of the importance of decentralization to scaling)? If you want to share.
I don't see a clear distinction in the data, and I also think your definition of centralized is somewhat strained. For example, I don't think laundromats are centralized for the most part, at least not the same way as electricity. And yet, electricity shows only a modest deviation from the S-curve. Telephones are about as centralized as electricity, and in fact influenced by network-effects, yet show a more extreme deviation. Again, you can fit almost whatever narrative you want to this data.
Just before you posted, I posted an alternative reasoning on clothes washers and autos.
Notice how much faster the radio and refrigerator scaled despite the Great Depression, as compared to electricity, telephone, and auto. Stoves and clothes washers we can explain as having replacement options, but radio and refrigerator have no replacements and they are decentralized. Radio is highly decentralized (I built one with my Radio Shack kit) and I suppose highly sought for informational advantage.
Centralization appears to radically slow down the exponent on the logistic curve, or perhaps in some cases (e.g. autos) totally disrupt it. But again my log-logistic point for Bitcoin can also be explained by competitors within a technology adoption.
Edit: add that I think most (or at least 30%!) of the people who would be interested in Bitcoin in the decentralized form where you needed to download a client and be technical, have already heard of it.
I think this is extremely wrong. Napster grew to 20-30 million users with people downloading a client and being somewhat technical (using an MP3 player or burning a CD was not a particularly user-friendly process at the time).
I downloaded it (or some Gnutella thing, I forget). It was easy to use. And I got instant gratification for that hassle, in I immediately recovered lost songs (from CDs I had owned in the past) that I hadn't been able to locate in retail.
So my point is that recovering music from youth is a very popular fad activity for the baby boomers and X-gens who were still energetic 13 years ago.
Now it is even easier with beemp3.com or one of the free online tools to convert youtubes to mp3 audio files. And that is for a pppular mainstream activity and motivation.
This is quite different from convincing me to download a Bitcoin client (which is totally useless now with my CPU) to perform some obscure activity of limited utility to me. I have never done this. The most I've done is acquired some BTC on localbitcoins as efficiently as I could to solve some need to be pseudo-anonymous or receive donations. There was no way I was going to waste my time downloading a Bitcoin client and also place and wait for an order for an ASIC miner to arrive.
Bitcoin does not have anywhere near 30 million users, and the corresponding market (people globally with access to the internet) is far larger than it was in 2001, likely an order of magnitude, or possibly two orders. Bitcoin has perhaps 1 million users, probably fewer if one excludes coinbase-style services (see below), which is approximately 0%.
Whether it ever grows beyond 0% of the real market remains to be seen, but right now you are curve fitting on something that isn't really much of a curve.
I agree that coinbase-style services are more of a competitor than actual adoption of bitcoin.
Everyone who comes in now will come in only through an exchange. No one will be mining.
That is why I say the key driver will be the
hunt for 1% which will drive everyone who earns $100,000 to find a safe haven. Then mining will be very important as it is will be easiest way to obtain coin anonymously.
The other big potential demand driver I see is decentralized payments over social networking. Thiel sees this too, which why he busy to try to co-opt with WhatsApp. The issue here could be taxes and KYC paperwork, at least in the west. I suppose he will try to work within exclusions under certain thresholds. With anonymity and decentralized, we could potentially middle finger that.
So if you are going to bring that Napster size market into your crypto-currency, you are going to need your wallet client integrated into social networking.