The fediverse is an ok alternative for some people, but not all.
Just the past few days I was troubleshooting some Linux issues with my new installation and 90% of the useful search results I found were from reddit. If global text search is not implemented on the fediverse, then it's just gonna be useful for twitter like content, not reddit content.
Reddit has a 16-year head start in domain authority, search engines will be obviously do a better job of indexing their pages than a mostly new service. In time, alternative sources will be indexed and visible in search results as well.
As long as those issues persist (and the post title is likely a hard one), Reddit will always have an advantage since it's built to be more SEO friendly.
Reddit may be more SEO friendly for now, but if it's content suffers and search results are degraded, search engines will probably to look to change how they rank results.
It's not about 16 years of SEO optimization, it's about a good chunk of the fediverse being opposed to search indexing because they have nightmare about bots:
Just the past few days I was troubleshooting some Linux issues with my new installation and 90% of the useful search results I found were from reddit. If global text search is not implemented on the fediverse, then it's just gonna be useful for twitter like content, not reddit content.