I believe that Sai is made by a single developer; and I assume that making shell extensions and coding drawing applications are quite different challenges. In addition, Sai's price is quite low.
Timbris
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A member registered May 09, 2020
Recent community posts
Stop nagging him. Especially in a time when people have vastly different problems. I made this account just to write this comment. The request was already made, and the developer gave a very nice answer. It is regrettable that no thumbnailing support for Sai 2 is available; but that's not Wunkolo's fault. If you want something from him, consider donating. If all he gets from his work are begging comments, then it's not attractive to do something for others. I understand your sentiment, because the lack of thumbnails is negatively affecting me, too. But I don't nag, and neither should you.