Right
> All of those business cases already exist in a reasonably accessible form.
Disagree. I live in a wealthy EU country and payments from my bank account have been frozen many times for several days because, e.g., I sent a modest amount via Western Union. I essentially had to say "sorry, wont happen again" to get access to my own money. I am unable to get certain credit from my bank because of my employment contract (i.e. rolling yearly contract) even though I have a good income and savings. And what's the interest rate on deposits in the developed countries, 0-1%? Negative interest rates are being applied to certain deposit accounts in my country.
I see DeFi lending as a different business case just by way of its global nature and overall accessibility. Another commenter mentions that its just used to buy crypto, i.e., it's a house of cards. That some people currently use it for leverage is irrelevant. Middlemen have been completely removed from lending and exchange via DeFi and it can't be undone now. Even with strict KYC/AML and regulation at crypto off-ramps it can't be undone.
> Banking in the developing world is definitely a problem, personally I'm not sure using a pretty volatile currency like ethereum
You can lend/borrow stablecoins (USDc), even if you're in the developing world.