Nothing in the article suggests maintenance releases, but MS' history is probably enough for that. The article does definitely state that .Net 5 is the evolution of Core and will be the entire platform going forward. I'm, personally, glad to see Core/Framework/Mono etc rolled into a single version at 5. The previous split versions have been fairly confusing.

yep! this blog post is more clear about future releases: https://devblogs.microsoft.com/dotnet/net-core-is-the-future...

"We will continue to both service and support .NET Framework, which includes bug–, reliability– and security fixes."