often look weird since math isn't automatically made bold, but sometimes there might be objects like $\mathrm{B}$ and $\mathbf{B}$ which would be confused with each other if everything is rendered in bold.
Design Plan. Implement an automatic and natural bold for sections that "just works" in practice, and a way to turn it off when required. Optical sizes for math should also "just work" in practice in cases like this too.
Problem. Section headers like e.g.
often look weird since math isn't automatically made bold, but sometimes there might be objects like $\mathrm{B}$ and $\mathbf{B}$ which would be confused with each other if everything is rendered in bold.
Design Plan. Implement an automatic and natural bold for sections that "just works" in practice, and a way to turn it off when required. Optical sizes for math should also "just work" in practice in cases like this too.