UX problems with base layer payments include: - Mining fees are sometimes high - Confirmations usually take several minutes - Using it privately requires running a coinjoin server UX problems with lightning payments include: - Setup fees are sometimes high - Payments frequently fail - Payments aren't asynchronous (the recipient has to stand there with their device open waiting to do a revoke_and_ack on their old state -- unless they use a custodian) - Payments that *do* succeed occasionally take more than 30 seconds (due to stuck payments, automatic retries, and no ability to say "stop retrying" in any existing wallets that I'm aware of) - Using it privately requires manual channel management