I'm software stream. I'll let you know how I get on!
I did apply once before for the summer cohort (which looking back would have been a disaster for me anyway around school holidays). Didn't get to interview that time at all.
I made changes to my application and took a few more courses before applying again, and did another coding project off my own back for a local community group that i also put on my GitHub. I redid my recorded interview to be more tailored. I also thought quite a lot about how to showcase my non coding, transferable skills acquired over a moderately lengthy different career, and emphasised those quite a lot and tried to make some of them my USP.
It's hard to know if this was what made the difference though, or if it was luck, or something else / combination of factors... and I applied to very different sponsors each time. I think there is an element of it being a numbers game as I'm sure there are still lots of really competent, excellent applications that aren't getting through, at least not for any given cohort.
I feel very lucky to have a place and as I said, enjoying it a lot so far and managing the juggle with work/childcare/volunteering- it doesn't feel impossible which was my other fear, though you definitely need to plan and think about how to manage other commitments and either who will take them on, or what can reasonably be dropped. Good luck to those who do apply for the next cohort.