Yahoo Is The New Google.
In 1998 when Google’s Larry Page and Sergey Brin had approached Yahoo with an offer to sell their PageRank system for as little as $1 million.
Yahoo being dumbfounded refused their offer because it wanted to develop its own platform.
Yahoo acquired search engine Inktomi and ad revenue maker Overture in its mission to build the search engine that would topple Google.
Again, Yahoo failed in execution while Brin and Page brilliantly took Google to new heights

Imagine if things had happened differently and yahoo had actually accepted the offer and bought google for merely 1 million. What would have happened? How would things be different from what they are?
Lets dig in deeper in this scenario.
Brand Value
It all started with Yahoo being valued at $100 billion its heydays and ended with it being sold for just $4.83billion to Verizon. Yahoo ended up being overthrown completely and couldn't execute its own plans. It failed to modify it's interface with the rising demands of users and failed miserably.
Whereas, Google shooted high with abrassing all new and attractive features leaving behind all its competitors. Eversince, the now $500 company hasn’t had to look back. Google is doing really well and has been constantly adding and modifying features to awe its users.
Popularity
Yahoo has stagnated in its growth and has had a huge pause at 227.8 million active users. Whereas google is darting beyond 1Billion active users per month.
So considering these factors, there stands a high probability that had yahoo bought google, we wouldn't have all astonishing features and wouldn't feel lucky enough.
