Bitcoin doesn't scale. Saying that 3rd party companies and offchain transactions will solve this goes against the very idea of bitcoin.
Also the deva saying "ohh, don't worry, we will look into it when it becomes a real problem" is a very bad sign IMHO.
The usage pattern might change if the blocks are full, people will plan their transaction more carefully and less frequently. You don't change bank just because it is not open during weekend, you simply stop doing transactions during weekend