I had a long term interest in internet money, from before Bitcoin existed. The path to Bitcoin was kind of convoluted.
About 20 years ago I was interested in environmentalism. I was persuaded by arguments that humanity was damaging the environment because of the system of money it used, in which sustainably managing a forest might be profitable at, say, interest rates of 2%, but if interest rates went up to 5% then the rational thing to do was clear cut the forest and invest the returns.
This led me to a book called The Future of Money by Bernard Leitaer. This book talked about "community currencies". The idea you could design currencies to achieve particular social goals was very interesting to me. The book referenced a publication called the International Journal of Community Currency Research. This organisation turned out to have a Yahoo Group, which I joined. I felt that if there were other people discussing this idea, they would surely be found on the internet.
One day the Yahoo Group received a mail talking about a project called Ripple. This was an initiative by Ryan Fugger to create a system that could locate and manage debt in a decentralised way. It proposed an economic system without cash, in which all payments were in the form of debt in whatever units people found convenient (dollars, hours of work, loaves of bread baked etc). So I joined the Ripple mailing list too, and engaged in much fruitful discussion with Ryan about the nature of money.
The Ripple mailing list eventually received a mail that pointed to the bitcoin website and suggested we check it out. This was a few months after the project was launched. I did so, and started emailing Satoshi.
I don't know how Satoshi remained anonymous for so long. I suspect that if his identity is ever revealed, people will think: it was so obvious? Why didn't anyone see that? When the operator of the Silk Road was revealed, it turned out he'd made basic and obvious errors very early on and anyone could have figured out the Dread Pirate's identity through basic web searches. But only the FBI actually bothered to do it. I suspect Satoshi hasn't been looked for as thoroughly as people tend to imagine.
I discussed Bitcoin's scaling extensively two years ago. You can find those discussions on my blog if you like. Nothing has changed and I have nothing further to say on the matter.