The true greatness of the game is how text based it is. Because it didn't have VO, the text could be far more abundant. It meant there could be truly interesting dynamics around information.
You needed to find the right questions to ask or the right level of friendliness or intimidation to for example unlock the secret of a murder. The characters would also give you long explanations of how to find places. Finding places became something you could become good at. Sometimes the directions were wrong which might leave you stuck on a mission for some time.
The later game in the series have traded in some of this but the limited options necessitated by VO just mean they cannot be as robust. The newer games have a very paint by numbers sameness to every mission. Obviously this is to streamline the games for a wider audience.
You needed to find the right questions to ask or the right level of friendliness or intimidation to for example unlock the secret of a murder. The characters would also give you long explanations of how to find places. Finding places became something you could become good at. Sometimes the directions were wrong which might leave you stuck on a mission for some time.
The later game in the series have traded in some of this but the limited options necessitated by VO just mean they cannot be as robust. The newer games have a very paint by numbers sameness to every mission. Obviously this is to streamline the games for a wider audience.
Though they are still incredible achievements.