What exactly are they stealing from you? If you bought a car in the 1970's and the company doesn't make parts for it anymore is that theft? What obligation do they have to maintain?
A better analogy would be: If you bought a car in 1970 and the company stopped making the super special fuel blend that they have a patent on and no one else is allowed to produce, making your car unusable. Is that theft?
Same can be said about software. People create aftermarket parts just the same as they create third party server implementations.
Consumer Rights Act (UK, 2015) has specific inclusion of digital goods. We can't be the only country doing that.
Its irrational to think a company is going to keep game servers running forever and that somehow they are "stealing" from you because you purchased something nearly 20 years ago.
Yes, doesn't make sense, then again not less than your analogy.