Some pepole in Italy were actually arguing for stronger limitations for 18-24 months until a vaccine was ready, and IIRC someone mentioned on HN a similar strategy (2 months closed - 1 months open) suggested for the UK.
So, there are people (in the authority chain) proposing for that. Whether they'll get listened to or not, it is another matter entirely. Personally I hope they don't.
And "flattening the curve" to buy time until we get a vaccine or a very successful treatment was literally in the comment I replied to. Not as in "we must lockdown until then", but as a goal we may reach if we continue with strict measures.
It's fine to want that, we just have to be aware that it might not happen (or might not happen soon) and that it isn't free.
"Flattening the curve" was, at least here, generally translated into "stay at home if possible, keep 2m distance in public, close non-essential stores and offices". And those aren't sustainable, and they come at a price.