Regarding L2, let's consider Lightning. I think the Lightning network is currently the fastest and cheapest payment network for everyday use. Moreover, as long as you don't leave the Lightning network, it offers Tor-like anonymity. Furthermore, everyone has the chance to run their own node, ensuring complete security. So, the Lightning network is currently very fast, private and secure. I think it's successful. It's also always open to technological advancement. Technically, there's nothing preventing me from making a Bitcoin Lightning payment with a QR code at credit card speed in a bar. It just needs to become widespread and adopted. Don't you think that's good?

By the way, I really respect Monero's level of privacy. My point is wouldn't it be better for everyone to build a Bitcoin L2 with a technology similar to Monero? Because you know, Monero has been delisted from many exchanges. But they can't delist BTC.