> Even arm32 and x86 are Tier 2. Not exactly unusual architectures. There is 32-bit x86 tier 1 targets like i686-unknown-linux-gnu. > The only Tier 1 architec

> Even arm32 and x86 are Tier 2. Not exactly unusual architectures. There is 32-bit x86 tier 1 targets like i686-unknown-linux-gnu. > The only Tier 1 architectures are [...] only the absolute mainstream. Not exactly a bastion of architecture support. Tier 1 means that the target has the full testsuite run against it for each single pull request. Running the CI is computationally extremely complex, and it is hard to provide a reliable and fast CI service for most architectures.