My personal belief is simply that J.C. Staff wants to prioritize the main series. I see the first Sword Oratoria season as an experiment if they could pull another Index/Railgun franchise, and so when it didn't do as well in comparison, decided to just focus on the main anime (my other belief is they were using the season as filler to wait for the main series to release more LNs).

I can understand the hesitation since that first season wasn't as critically or commercially successful, but I think those first few volumes are by far the weakest part of SO anyway, so it's a shame there probably won't be more since all the future volumes are a significant improvement and would be great to see.

Thanks for your insight

The lack of commercial success was because it focused too much on Lafiya who is super annoying in the anime imho.

I also think the plot of SO is way busier and harder to follow in the anime. Before I read the novels I didn’t really understand what was really going on.

After season 5 comes out and while waiting for the next arc of the MC to be fully written, I think they should do a SO movie covering the Knossos arc because that was the best part of SO.

Even before the knossos war (which can be separated in 3 well-made movie) they need to do the hyriute sisters and bete arc into a movie. I mean if the fight scene of those two arc are well made it will be awesome

Making everything a movie is lazy, not to mention it'd never get passed after S1