revertts

I think you’re understating how many quic implementations exist. Google, Apple, F5, Facebook, Fastly, Cloudflare, Microsoft, AWS all have separate implementations servicing significant production traffic, most of them open source. That doesn’t even count the smaller, language-specific implementations. Searching for quic interop tests is a good way to discover the various implementations.

Failures while communicating to the external systems (the kv store and elastic in your example) are usually where this falls down. It's easy to build a system that's consistent ~90% of the time, but if you want to build a system where things like failures during snapshot write or failures during export to elastic are handled properly it starts getting complex (you will need to find ways to recover and retract data, or build smarts into the consumer to query around aborts, or find a way to do a 2PC-esque dance with the external system a la Kafka's transaction support, etc.). Getting to full consistency isn't easy.

It's very hard for Kafka Connect plugins to maintain consistency in all scenarios - both because of the semantics of some upstream databases, and because of the guarantees the connect API itself offers. Hopefully KIP-618 will eliminate more of the edge cases though.

Were the amazon purchases all from the same amazon account?

Many of the current users, including the creator, are in gamedev. Being extensible in a language they’re already intimately familiar with is a selling point.

This is done by some apps today, though the motivation was typically network perf (http2 and then QUIC support). The stacks are large - on iOS it's difficult to take over a portion of networking without rebuilding a substantial amount of it, so you'll have TLS, a full http stack, plus all supporting logic for connection pooling, etc. The closest thing to an open-source, drop-in option like this is cronet, the networking core of chromium packaged as a standalone library. Last I looked it was multiple megabytes in size, which is still a substantial cost for iOS apps. They can also be quirky to use because they fight against the system's defaults in some areas and can cause other inefficiencies (typically outweighed by the network improvements).

I believe Uber talked publicly about adopting cronet, and Facebook gave a talk about mobile proxygen (though it is not open-source). If you pop open the Netflix and Youtube apps, you will likely see the same.

I read their point as “information hiding is not a concept exclusive to OO.”

Whether or not the original quote meant to imply that I’m not sure, but do see how it could be read that way.