One thing to keep in mind though, is even on ssds you need to encrypt your data to be absolutely sure it isn’t recoverable. Nothing more permanently unrecoverable than deleting your encryption key short of physically destroying the media.

One nifty fact about ssds is they usually have a good amount of extra space (over provisioning, with newer drives having less so than older ones) to allow the controller to swap out bad blocks without losing available space or use it as cache. Because of this, you may have normally inaccessible blocks that still contain data but have been taken out of the normal usage pool.