One reason could be the lack of innovation in the plot. It might have followed the same old formula as previous installments without bringing enough new elements to the table.
It could be due to a number of reasons. Maybe she had an underlying health condition or it was a result of some sort of trauma she experienced earlier.
The Metal Gear Solid games are important to the story because they build a complex and deep lore. Each game adds new elements, characters, and plot twists. For example, the overarching theme of nuclear deterrence and the role of the Metal Gear weapons is explored throughout the series. It also delves into the moral and ethical implications of war and espionage, which makes the story not only exciting but also thought - provoking.
They're popular because it's an unexpected pairing. People like exploring relationships that are out of the ordinary in the Sonic universe. It's a fresh take on the characters.