The fact is that technology advances and makes other technology obsolete,

Yeah, it happens on both sides, it's an arms race. It will swing the other way eventually - it always has and always will

The second thing you're not addressing is how long the "ebb and flow" takes anyway

That was intentional. There's no estimating a timeline, but with the development of technology it's not unreasonable to expect a reversal even in a decade. Anyway, if you're trying to ward off doomerism you're not going to do it by only looking at what you stand to gain