100k transactions per section w/ serializability and all of the other things required to satisfy real-world concerns like fraud and regulatory constraints?
Today: several thousand tx/sec in "rollups," just by compressing transactions to minimal information and using zero-knowledge proofs that everything is valid. That's in production. The same transaction data is available on chain but e.g. instead of a sig on each transaction you have a compact proof that every tx had a valid sig.
Later: data sharding, where you're doing the same thing but each Ethereum node only has to store a portion of that data. That will multiply rollup capacity by 23X.
Last thing a "crypto" user wants is his account being put on hold for months for various reasons (i.e paypal style), usually "for his own protection". I believe it's a mistake see crypto payments like a replacement for visa/mastercard. It's good to have some competition.
Bold of you to assume that the crypto-crowd have seriously taken fraud and and consumer protections into account. Crypto-currencies are a poor technical “solution” to a socio-economic problem, and while this remains the case associated problems (regulatory constraints, etc) will continue to be things that are relegated to the “don’t care/won’t fix/too hard” basket at worst, and stapled on as an afterthought at best. That’s before we even get to the hardcore libertarian mindset that is incredibly prelevant in crypto-currencies.
It's more than that, they view existing outside the reach of the legal system and consumer protections as being a benefit. "No chargebacks" is a major selling point that the community uses to evangelize to merchants, and the flip side of that is that it's much less protections for consumers.
The Internet doesn't have built in mechanisms for regulation or fraud and nor should it. Cryptocurrencies obviously don't solve the problem, but can be used to create a stricter set of guarentees than the current sustem.
Just to name two examples. Cryptocurrency like cash won't stop you from falling to fraud or illegal activity but communities and regulations could enforce a safe subset of projects with stronger guarentees than the current system.