I think they should definitely relax. I don't know if games have a end of life on copyright like other stuff, but most people are just doing this to hold onto some joy they had from their past. I remember seeing a game in an arcade a long time ago called Midnight Resistance. It was a Contra kind of clone, but the graphics were so next level compared to what I was used to on the NES. Turns out it was only available on the NEOGEO or something like that. No chance I was ever going to buy one of those back in the day. Then lo and behold, I finally find it as an emulator when I am 20 years older. It was so fun to relive those memories from that arcade.