You're looking at the bootstrap install repo. That's barely changed since 5.0 was released in 2015-ish. The framework repo[1] is still being maintained by many different developers and sees a significant new release every 6 months. Taylor still accounts for a significant amount of contributions, but it is his project afterall. Also worth noting that the framework has pretty much reached maturity at this point and updates are more focused on stability and bug fixes than new features. A lot of the work being done is on the ecosystem being built around Laravel (see "The Laravel Ecosystem" on [2]), with Taylor currently teasing another new piece to the ecosystem to be released with Laravel 8 in a few weeks that apparently involves inertia.js (whose maintainer is a speaker at the Laracon event too, if I remember correctly)

1: https://github.com/laravel/framework/graphs/contributors

2: https://laravel.com/