Character speed control is even older than that; many of Sierra's games in the 1980s/early 1990s (like King's Quest, Space Quest, etc.) had them. Adjusting them made some of them even easier, because it didn't affect enemies, allowing you to easily evade them during chase scenes.
I can only think of a few games that have had customizable difficulty. The problem with them is they complicate the user experience, and most people would rather not tinker with them.
Please ignore cloud; they have been posting inaccurate flamebait throughout this thread.
I would never not buy a laptop from Apple. Not only are they the last PC maker that hasn't fallen to the Microsoft Monopoly Machine, but their laptops are well-built†, futuristic, and have incredible value and battery life for what you get. Especially since they migrated off of Intel.
† I know someone will inevitably come up with a counter-example, but the last time they had a widespread quality problem was a little more than ten years ago.