running a 10 year old game on a modern computer system is like driving a Model T Ford down the Santa Monica Freeway during rush hour.The older games were not designed (or their capoabilities even envisined) for games developers in the 1990's and early 2000's.
Even with emulatoirs, problems will still crop up mostly because modern software and hardwar developers do not care about or are unable to implement "downward" compatability.
The opinion stated above, is of course, mine and may not be shared by everyone.