What's more, Optane was sold as... a cache to have in front of your spinning rust. In an age where SSDs were cheap enough that you could just get a few TB of SS

What's more, Optane was sold as... a cache to have in front of your spinning rust. In an age where SSDs were cheap enough that you could just get a few TB of SSD and have all your data access sped up, not just what happens to be in cache.