Removing downvoting feels intuitively wrong to me (eg, I believe that dissent is a really important part of a healthy democracy). If all those mega-corp platforms are removing downvoting, then I'm pretty confident my intuition on this matter is correct
The voting will stay but your homepage will be a for you page that selects posts based on your usage data and whatever is trending instead of the votes, in an attempt to bring engagement to a maximum. Just like what's been happening to Instagram for years.
And it happened right when it became apparent that we were living in the Disinformation Age and every bit of power to flag bullshit content became that much more important.