There's nothing wrong with saying, "Look, I'll do everything I can to help you, but you're using a PowerPC on a $5000 FPGA board that I don't have, so the things I'll be able to do for you may be somewhat limited." It's super common to see kernel developers responding to bug reports stating that they need more traces from people with the affected hardware configuration. How is this any different?
Tier 2 support is still support, and there are a lot of tier 2 targets. Seriously, look at the list:
https://doc.rust-lang.org/nightly/rustc/platform-support.htm...
There's nothing wrong with saying, "Look, I'll do everything I can to help you, but you're using a PowerPC on a $5000 FPGA board that I don't have, so the things I'll be able to do for you may be somewhat limited." It's super common to see kernel developers responding to bug reports stating that they need more traces from people with the affected hardware configuration. How is this any different?