why tarpc?

[rbtcollins]

Hi ! (followed your link in Linkedin to github, but since the website linked in the github org metadata is a 404, I can't ask these naive questions outside of the bug tracker. Sorry!).

So the first one is - why tarpc? I mean, it seems nice, but it seems vulnerable to cross-language portability issues (such as having to redefine the protocol in every language, or use a transport orientated schema like openapi/swagger rather than the much more precise protobuf. google/tarpc#161 is closed but not particularly satisfactorily.

I had a good look around and couldn't find any motivating decision for this. I would have expected tower-rs+tonic or similar to be the default choice.