10-12 month, no kidding.
thats not true, he asked for the update shedule before season 3, and it was 3-6 months for most season 1+2 episodes. They become bigger each time... but the main reason for the long development time now are the animations. DPC didnt do that much complex animations in season 1+2, its a new thing he is doing since the interlude.
You can call it his new "passion" he wasnt nearly that obsessed with high quality animations in the seasons before... and they take time... a lot. 335 animations for episode 10, he was able to render about 1 animation per day... you get the picture. If he would cut back on those he could release a episode like ep10 in about 6-7 months.
BUT he will not do so, he loves those pointless animations way too much... so yeah, now its a 10-12 months shedule, ep 11 will maybe come out just in time to make it into 2024.