It didn't go very wrong for the purchasing party -- AOL:
* AOL was very, very overvalued.
* They bought a company with real worth.
* When the .com bubble popped, they were left with Time Warner.
It'd be a dead company without it. On the other hand, it did very badly by Time Warner and its investors.
There are two possibilities here:
1. AI is gold, and NVidia is leading AI.
2. AI is a bubble, and NVidia is overvalued by a factor of 10-100x.
In the case of #2, buying Intel converts funny money into real value, gives Intel engineering capability it so obviously now lacks to continue to push x86 forward, and gives NVidia engineers many, many decades of x86 R&D. In that sense, it can be thought of as a hedge on AI not succeeding (or someone overtaking NVidia in AI).
In the case of #1, it either gives NVidia huge marketing and distribution channels, an end-to-end platform play, and a bunch of supporting IP, while chaining it to an obsolete corporation with 5x the employees. It also allows NVidia to do some antitrusty things by connecting with the dominant CPU platform (e.g. making iGPU chips, and various sorts of hybrids where Intel + Nvidia work best together).