I just finished submitting my application to YC for Saasify.
I highly recommend that every startup founder go through the process of applying to YC or a similar accelerator. Regardless of whether or not you get accepted, the application process itself is imho invaluable in terms of forcing you to answer hard questions about what you're working on.
I'm still pretty early on in the development of Saasify, but I figure that applying can't hurt.
Here's the video for my YC application -- I was so nervous and did soooo many takes lol! 😅