Even arm32 and x86 are Tier 2. Not exactly unusual architectures. The only Tier 1 architectures are amd64 and arm64, i.e. only the absolute mainstream. Not exactly a bastion of architecture support.
> 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.
