Yes, a split like this would be undesirable to say the least. Not to mention that systems people are used to near-total backwards compatibility; any sort of near-term timeframe for such a thing would destroy a lot of our credibility, in my personal opinion. I'm on team "never 2.0".

We still have some desire to indicate "epochs" of Rust development, as undoubtedly, things like idioms will change over time, new libraries will replace older ones, etc. But I'd prefer something like "modern C++", which could signify this kind of change, without giving up on backwards compatibility.