Well, we never got any Sega World Indonesia here so there's nothing that I miss.
Not really though.
I do miss arcade centers which's full of SEGA arcade games like Space Harriers, Virtua Fighter, Hang-On, and Daytona USA.

Picture source: https://x.com/Hisui_Metalhawk/status/1995789787714793693
Maybe someday Sega will get second wind, but I believe the reason why Sony and Nintendo get theme parks and markets is because they're not just video game producers. They make consoles and hardware. Sega no longer does that.