Timing was critical too for Myst too I think; it came at the point when many ‘ordinary’ (for want of a better word) families were buying their first home PCs. My experience was that Myst and Riven found fans among people not traditionally PC gamers, often via word of mouth that this was something interesting one could do on their relatively expensive new fangled PC investment.
This might be an unpopular opinion, but I don’t think it holds up all that well as a ‘game’ in 2018, our expectations of video games are rightly so much greater. The standards of adventure games improved dramatically in subsequent decades. If you are looking for a Myst style puzzle world to lose one’s self in in 2018, Jonathan Blow’s game “The Witness” is arguably a strong modern spiritual successor.