At this point, I don’t care much about density. 1TB is enough for me. What I care about is access time. For this reason, I much prefer SSDs and will never go back to magnetic drives again.
As long as you have good backups, you'll be OK. The biggest problem with SSDs IMO, is that too many of their failure modes is completely catastrophic and unrecoverable.
They are also too expensive for my purposes, except for the boot drive (where speed is most needed anyway). I still store my data on HDDs because they are much cheaper, and transfer rates isn't nearly as important for me.