Python 2.7 is still used in production. 

Given the scarcity of IPv4-addresses — and with CDNs (think: Amazon, Akamai, EdgeCast…) starting to offer HTTP+SSL — the need for SNI arises in order to avoid pitfalls such as shared certificates.

The lack of ubiquitous support for TLS SNI could cause delays in HTTPS-everywhere–deployments. Therefore, in the light of the latest revelations about mass surveillance, I'd like even to argue that this is a matter of security and privacy.