On Mon, Jun 15, 2020 at 08:04:47PM +0200, Francesco Poli wrote: > The reason is that the one-way compatibility mechanism of CC-by-sa v4.0 > is not exceptionally clear, and, without that compatibility, the > CC-by-sa v4.0 license itself has a number of controversial clauses > (non-free, in my own personal opinion).
CC-BY 4.0 (without SA) may be better than CC-BY-SA in that case, according to the FSF it's compatible and accepted as a free license (for content which is not a program).