There's a great and very common use case for LLC to C corp, so we prioritized building that. I'd love to hear what your use case is for the other way around; if it is something which creates a lot of value for a lot of founders, we'll certainly consider supporting it in the future.
Speaking broadly: You can always work with lawyers/accountants to see about the feasibility of converting your C corp into an LLC. We just haven't worked to specifically enable it in the fashion that we attempted to smooth out LLC-to-C-corp.
My use case is that I used Atlas to incorporate quickly -- which was lovely -- but the business is turning out to be a solo venture and the C Corp is overkill.
The real user need is a way to reduce business operations time and cost for a small biz.
Speaking broadly: You can always work with lawyers/accountants to see about the feasibility of converting your C corp into an LLC. We just haven't worked to specifically enable it in the fashion that we attempted to smooth out LLC-to-C-corp.