I do think that, as great of a job as Dreams does of being an end-to-end controller-friendly game development tool, it's still a massive ask when there's no avenue to sell your work. Without even having that, a lot of the people that would put time into game development would sooner opt to use more powerful and more universal tools on PC, even if Dreams is a great learning tool/stepping stone.
On the player's side of things, I know everyone has been saying it forever but it really should be included with the PS5. I'm also surprised at how many of my PS4-owning friends hadn't heard of the release at all.