They’ve got options.

• never build in forced server components to begin with
• patch out the need for the server as part of the last update before support ends
• give buyers access to run their own servers with an officially-provided executable and set the client to connect to that executable
• open source the whole thing

And maybe others. It’s about making sure that a product you have paid for actually works as it was sold to you. It’s honestly a really basic consumer protection concept. You sell me a television and it stops working within a reasonable lifetime due to your own failure, and you’re obligated to repair or replace it. The same should be true of software.