[vtsingaras]

The problem with opportunistic TLS is that while it protects from wide-scale DPI it doesn't protect against MITM. Personally I think that the effort that would be put to implementing opportunistic TLS in all web servers and browsers would be better put to migrating all web applications to HTTPS only.

[IshKebab]

Agreed, and MitM is arguably a bigger threat than DPI to most people, especially if you use coffee shop wifi, etc.