Honestly, there are still a lot of shmups that i wish would get a new port or at least a new entry, i mean, many games are arcade only, or only got released on an old platform and no service like VC brought them back yet.
Even when there could a chance, i mean, look at the arcade game Mazinger Z:
It's arcade exclusive, never got any port and while it's not the greatest game ever, it's still a fun game that i wish would have a port, particularly since it's based on an old anime series...no, THREE anime series with the player choosing three robots to fight bad guys.
Even worse?
The franchise it's based on never died, for God's sake, Mazinger Z:Infinity is a movie that came out last year and it makes constant appearances in video games alongside franchises like Gundam, to a point where they just felt like giving Kabuto Kouji, the pilot of Mazinger Z, a new and exclusive mecha for a game that was all about crossovers between mecha anime while everyone else including the Gundam series got stuck with their canon mechas:
You'd think that being a game based on an influential anime franchise that still managed to recently get a movie and constantly appears alongside Gundam, to a point where they still make wholly original mechas in games for the Mazin characters, that the Mazinger Z shmup would have gotten a port somewhere, but nope, arcade only.
Or Hyper Duel, would love to see it get a port for the Switch, or Harmful Park.