TL;DR As of June 2024 development is on indefinite hold, see Prometheus' Patreon post.
Just came here to check for an update and saw that Prometheus has made a public post on their Patreon, saying that development is on indefinate pause due to IRL commitments. They end it with the following note though:
"However, whether I finish the game as an AVN or not, this will not be the end of Evermore. I still fully intend to see the story through to the end because of how much I love it, though it’ll likely be in a different medium."
https://www.patreon.com/posts/indefinite-pause-105527384
Thanks for sharing the journey with us Prometheus. Evermore is one of the more remarkable AVNs out there, and while it's sad that we likely won't get a conclusion to the story in its current format, it's nice that we got as much as we did.