Sinatra 4.0: The Long Standing Ruby Webapp DSL — No official blog post yet, but the...
Sinatra 4.0: The Long Standing Ruby Webapp DSL — No official blog post yet, but the changelog has the full details. v4 gains support for Rack 3 (quite a big deal by itself), drops Rack 2 support, and requires Ruby 2.7.8 or higher.
