Despite only the most 'primitive' audiovisuals I'm still addicted to its descendants. They have some features not easily found in modern games, above all the difficulty and the challenge. Modern games often seem to be designed to let the player win.

What's your definition of "to be working"? In my opinion, Vista isn't working. I had a long array of problems: from audio issues to start menu entries deleted without an apparent reason. The only nice feature in Vista is persuading people to install other operative systems. For me it worked like a charm.

I think it's just a matter of sales. A game satisfing the lowest common denominator has more potential players than a complex and difficult game. Developing a game has high expenses: low sales means failure. Many software houses making complex and deep games had to face financial problems.

Some examples:
Troika Games
Black Isle Studios
Sir-Tech

As a matter of fact, a lot of people enjoy playing games that doesn't require too much reasoning. The others still play Nethack or ADOM for the lack of new interesting and challenging games.