The games have aged really well, but the one thing i'm concerned about is that new people will dive into it thinking it's some older version of a yakuza game (or something like that) while in actuality Shenmue is a slow burn, with no instant gratification (which is also the beauty of it). The more you spend playing it the more you'll get back in the end.
As a old friend used to say...
"it's a spiritual experience"