SSD prices continue to fall. You can get a 1TB Samsung EVO for $180 or a 500 GB for $99 right now. It is expected to fall another 20% at least in 2019.
Shit almost makes me want to get another one... haha
but 1 TB Samsung 960 EVO i already have more than enough for super fast storage.
You use mechanicals for mass storage!
Still - a 2nd one opens up RAID 1 options.... hmmmm