And implementing it during the season while staying inside the budget cap seems like a lot of work that you then can't spend on improving the concept and developed bodywork you already got, so even if those two teams could, it's unlikely they can do it before next season, and for this season it would be too late, unless Ferrari got the concept right but not worked out the best implementation. It will definitely be interesting to see how they compare, and what teams do next year!
Anyway, this thread really is great at showing what Ferrari saw to make them move to this concept, definitely made me appreciate why they were so enthusiastic about what they got.
To me it still seems quite complex, so with a lot of chance to get it slightly wrong, while in contrast Mercedes seems to have adapted their known, winning concept to these new rules, and from the little we saw of Red Bull they might be in a similar position. But, Ferrari wasn't the winning car over the last years so good on them to try something different. Again, this effor shows us on the outside some of why it might work well for them; great fit for the site, thanks for doing the work!