Just look at how Windows took over nearly most of the desktop market, they had far less stable and secure technology comparing with unix system at that time, especially the network part, but they get the right market direction before any other tech gurus realized it, they patch each bug, patch after patch, but their direction never changed: End user friendly

Similarly here, by putting all the transactions on-chain, you have to strive to find the best possible on-chain scaling technology, like thin blocks doing right now. But if you start to become lazy and try to use the old centralized financial models like payment channels because they can provide millions of transactions per second, then you just drag bitcoin into the old banking model, which will dramatically reduce its usage and increase its risk, especially when there are many other alt-coins provide on-chain scaling