No it isn't, it's the way open source is supposed to work. There being 92 pages of routers doesn't stop anyone from picking the most popular and well-maintained one. Almost anyone who actually cares is going to pick one of the large frameworks (which probably use Symfony) or use nikic's FastRoute. If you're worried about small packages being maintained into the future, that's what forking is for. If you want to write your own, you can.
Also, to be fair to your argument, Composer will load packages from outside Packagist, and VCS systems other than git, so the actual universe of available routers is probably much, much bigger. I'd suggest this as another example of how not conforming to a standard (Packagist as the de facto PHP repository) is a benefit. You don't even have to care about Packagist and Composer still works just fine.
Composer makes dependencies flat , and PHP isn't module based,but namespace and class based.
Which makes libraries way more stable,unlike the nodejs galaxy of packages for instance.
And by the way,most of the packages listed aren't routers.
If you only search the word "router",you'll get only 21 pages,roughly 300 packages.
now go on npm.org and type in router you'll get more than 1600 packages.
Where do you think the problem is ? is nodejs a module based language with dependency trees , or PHP , class and namespace based language with flat dependencies?
Also, to be fair to your argument, Composer will load packages from outside Packagist, and VCS systems other than git, so the actual universe of available routers is probably much, much bigger. I'd suggest this as another example of how not conforming to a standard (Packagist as the de facto PHP repository) is a benefit. You don't even have to care about Packagist and Composer still works just fine.