@janbeta and from an 'enjoying games' perspective emulation can also offer features the real thing can't. I'm all for genuine achievements and non-TAS-speedruns, but sometimes I just want to be able to finally get through a game from my childhood without having to struggle through obstacles that were introduced to pad game time, or lack of easy save options because the hardware/software just didn't offer it.
Being able to use #openMSX's reverse functionality and savestates has made many a game more enjoyable, and the save replay function has meant I've been able to easily share recordings of end demos or hidden things others might not have seen before.
@iThreepwood