Sorry to hear that you aren't as interested in Radiant. To answer the "if ever" part of your question: yeah, I absolutely plan to continue and finish Polarity.
The question of "when" is a bit more tricky. I'm currently seeking an artist for it because the artwork for the game is the single biggest struggle for me as a developer (I have zero natural talent for artwork, and not the best eye either).
Once things have gotten back on track with Radiant, I will be far more proactive and aggressive in seeking out these services... and when I've done so I'll be making a huge update here on Itch and on the game's Patreon with information about my plans going forward. Until then, I can only ask that you bear with me.
I know this priority may seem unfair since Polarity was started before Radiant... but Radiant is not a free game, unlike Polarity, and I'm also working with an artist... meaning I have to be more strict with its development.
I hope you can understand, and regardless, I appreciate you and your support of my projects.