[akvadrako]

> Today we have secure erase which is necessary to clear SSDs and I doubt there is any actual technology to recover from thia mechanism.

You might doubt it, but you also cannot provide much evidence against it. Trim commands just tell the controller to erase data – what they actually do internally isn't easy to discover without a major operation and internal knowledge.

The best bet is not trusting the drives at all, perhaps by storing only encrypted data, then throwing away the key.