(a) well, I only wanted to teach and onboard people to self-custodial wallets. and since many people are low income and prices for things are far lower it had to be done with LN. But then something like Phoenix can incur high fees if there is a congestion on the chain. Now there is something like Misty Breez or Aqua, where you can estimate the fees much better, but it's not 100% self custodial - I trust it though, but it's difficult to explain things like this to beginners, who only want to use bitcoin, not need to understand everything. So with wallets we are still not there. Still waiting for a wallet that has one balance and does everything else in the background (but not like Muun). Wallet of Satoshi is much easier - but that's not how I want people to adopt BTC.

(b) Bitcoin has a very bad reputation, that is a real obstacle. People often don't have the means (time and money) to educate themselves, they think they can make money quick or they wait for their government to "legalize" bitcoin. Also there is a lot of anxiousness around bitcoin - it's new, you can't touch it, the volatility... that's why 90% of crypto users use USDT