We stopped building i386 a few months ago as part of reducing infrastructure cost around.
In the case of i386 specifically, we’ve also started hitting issues as our normal build environment is on Ubuntu which has discontinued i386 a few years ago, so getting our build and validation tooling to work at all, has become a problem.
Building an architecture on our image server means around 50-100 image builds a day, which then need to be tested on the architecture in question prior to publishing and distribution through our image mirrors.
For i386, we were doing all this for less than 500 total image downloads daily with that number decreasing pretty quickly over the past couple of years.