I remember Pelles C being the first full C11 implementation, which I felt was impressive for such an unpopular toolchain. I guess they can't switch to a FOSS l

I remember Pelles C being the first full C11 implementation, which I felt was impressive for such an unpopular toolchain. I guess they can't switch to a FOSS licence because of the licence of LCC? How much of the original code even remains after more than 20 years and several C standards later?