Yeah, once the fediverse has had more opportunity to settle in and features like redirecting become available it would be cool to see communities move towards whatever instance is the best fit for the topic it fall into.
Like an instance that becomes a well known music instance, so becomes the automatic recommend for anyone looking to find a community for a specific genre or group. And a television instance that becomes the go to for any specific tv show based communities. A hobby instance where you can find like knitting or woodcarving.
Would be so much easier to find communities through topic based instances than the current random sprawl of communities.