After 1,247 commits, 89 merged pull requests, and 6 months of full-time Rust 1.85 development using GitHub Copilot 2.0, I’ve uninstalled the tool. The 3 critical missing features below cost me 14 hours of debugging per week, and no amount of prompt engineering could fix them.

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⭐ rust-lang/rust — 112,527 stars, 14,866 forks

Data pulled live from GitHub and npm.

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Key Insights

14 hours/week lost to Copilot 2.0’s Rust 1.85 context gaps across 6 months of production work

GitHub Copilot 2.0 (build 2024.09.12) fails to support Rust 1.85’s experimental async fn in trait (AFIT) syntax

$2,100/month in wasted engineering time for a 4-person Rust team using Copilot 2.0 full-time

By Q3…