Haha, if I got satoshi every time someone asked WEN SV2... Exactly, it's now a reality, ready for implementation and direct usage. We've mined over 600 blocks on testnet internally and are pretty confident it's great first start. Of course as people start using the software, we expect improvements, bugs and updates.

it means everyone can/should give it a try and help the SRI team understand how the community intends to adopt it, so we can fix bugs and make adaptations to the APIs

Yes it is finally here and it ready for miners to test it. Have a look! https://stratumprotocol.org/getting-started/