I noticed there's no mention of quantum-resistant crypto. Looking around, it looks like this is the rational [1]. This sort of feels like a hand-wave.
> Quantum computing does give us some far more efficient algorithms that classical computing cannot achieve, but even then, 256-bits still remains outside of the practical realm of mythical quantum computing when brute force searching.
For symmetric encryption, there is no point looking at "quantum resistance" because even if somebody has a non-toy quantum computer they get a speed-up equivalent to halving key length, so, just use longer (256 bit) keys and stop worrying about it.
For asymmetric encryption, nobody knows for sure, and the best available guesses are expensive with as-yet unknown reward, if you are vulnerable it's likely to be because you ignored the advice this gave you and insisted on Rolling Your Own. Too bad.
My guess is that in five years we'll be in the same situation. Like Fusion power generation, Quantum Computers might work "soon" or they might not and that'll remain true until they actually do work, which might never happen. They'll make great MacGuffins for Hollywood meanwhile and shouldn't affect what you, a non-expert, do all day.
> Quantum computing does give us some far more efficient algorithms that classical computing cannot achieve, but even then, 256-bits still remains outside of the practical realm of mythical quantum computing when brute force searching.
[1] https://pthree.org/2016/06/19/the-physics-of-brute-force/