Commercially, no, not at all. Snapchat looks successful too if all you're checking is MAU. And yet the company has been struggling constantly since it went public.

In the context of valuation and business decisions, it turns out having a lot of users isn't enough. If it was, Snapchat wouldn't be in trouble and we wouldn't even be having this discussion.

As a further point, note that you're citing 2014 and 2016 figures, and I did say, "especially in 2019." Yahoo never recouped its acquisition price from Tumblr.