The ones who don't leave Steam recognize that the 30% is getting covered by access to a much larger customer base and sales. It maybe doesn'♐t work for all publishers, but it is pretty clear from the size of Steam's game library that that is pretty uncommon.

Uไntil Steam's library starts to significantly sh🅰rink, their fees, by definition, are not too high.

Exactly. If it doesn't work with Playnit⛎e (I'm referring to you EA),൲ I don't bother with it.

But Playnite is just a launcher. When you shop for a game, you must use a storefront. I highly dou🤪bt any of the major storefronts would tolerate a storefront aggregator.