The key words in that thread are Daily and Aerial Goals. There is nuance involved.
We still do not have Daily Challenges. We give you a week to complete the Weekly Challenges so you have a seven day window to complete them and get those XP bonuses and items. We do have a Daily Win bonus now, but it is relatively small and doesn't feel bad to "miss out" on.
We try to avoid Challenges that encourage behavior in online play that is unusual. "Score Aerial Goals" might incentivize you to pass up an easy shot to make sure it's an Aerial Goal. However, a broader Challenge like "Score 5 Goals In Online Matches" isn't really a problem because scoring goals generally is a good thing for you and your team.
All that said, my personal position has absolutely changed since 2015 when we launched the game! One thing you encounter daily working on a game as big as Rocket League is that there are so many types of players. Some love items, some don't care. Some love Challenges, some hate Challenges. And I've become more open to "extrinsic" motivations like Challenges, or Battle Pass tiers, etc. because it satisfies a portion of the playerbase who really enjoy those things.