> Everything else was not seen as practically exploitable.
For a concrete blog post, see https://cyber.wtf/2017/07/28/negative-result-reading-kernel-...
Note that according to https://en.wikipedia.org/w/index.php?title=Spectre_(security... Spectre was published January 2018, i.e. this blog post is indeed older.
As I wrote: It was unclear how this potential threat could be used to create real attacks.
