The less enchantment removal you have, the more these go up in value
Keep in mind that, although Adventure cards are creatures the majority of the time, which means you can't tutor for them with cards like Solve the Equation, when you cast the Adventure side of it you are instead casting an instant or sorcery
While this likely isn't the plan of a tournament deck, Sundial of the Infinite has a cult following in Commander and is the perfect Against the Odds card, so while this interaction likely won't break into Modern, people will try it, and it will be awesome when it works
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In short, it produces threats that then turn into additional threats when dealt with