Ever worked in a company with micro services or a company that has a bunch of employees? You'll have hundreds of projects easily if it's a bunch of teams. If someone tells me "it's in our SRE libs package" I'll go ahead and search that. (Usually I can't find it because it's in a separate namespace on our Gitlab instance. Doing that is an Enterprise only feature on Gitlab right now: https://docs.gitlab.com/ee/user/search/advanced_global_searc...)
The point is that search is important and not a social network gimmick.
I work for a university that has a centralized IT, but each of the schools may also have an IT group. When they setup a local Gitlab instance I moved our team's (web development) projects over.
We have over 60 projects alone within our group (our own school was decentralized, and only in the last 5 or so years have I been able to get things centralized within our team), and there's a ton that the centralized IT group has on the instance, plus all of those that other schools share. We currently have three people in our team (two designers/front-end, one full stack), but at one point were at six plus a consultant.
I've got a good idea of what most of the 60+ repos contain, and where things are, but a good search for the various open repos, and those that I'm semi-associated with, would be fantastic.
There are, idk, 2000 to 5000 teams at the company I work at.