While it would be best if lemmy devs can be more involved with photon, photon is still completely open source and the project is open to contributors, worst case hypothetical scenario of if the project ever gets abandoned it can always be forked, continued, or even better it can be handed by the current dev to someone who can continue to keep it alive.

If photon is widely used I see no reason the dev would just abandon it as it is rather than handing over the project to someone else who has already been contributing.