Isn't it necessary to be on the Twitter platform in order to use Grok? Unlike lots of other people, I still use Twitter, but for those who don't, I would think it is an obstacle to using Grok.
The advantage of using Grok (or any alternative to Google Search!) is that there isn't an entire ecosystem of pervasive prying Alphabet services to go along with it: Gmail, Youtube, Google Play, Google SMS (Verizon terminated its SMS for text and recommended all users use Google instead, in November 2024), Google Meet or whatever they call it, and probably more. It can track you everywhere, and a deliberate effort is required to evade it with alternative providers.
You can sign-up using X / Google / Apple accounts or email so you are not forced to be locked in an ecosystem but you are benefiting from answers coming from and index made up of scapped web pages and an index of X posts (+others)
But this doesn't explain how/why Musk/X/xGrok isn't just more of the same.
Just like Google, Musk is driven by greed. What he really wants is some of Google's money for himself. And the easy way to achieve this is by doing what Google does --- or perhaps even working in cooperation with them.
This and the declining quality of results explain why I haven't used Google search in years.
Now, explain why Grok will not be more of the same? Meet the new boss, same as the old boss.