I've been playing SMTV off and on for a while now. I'm trying to stick to one game at a time on the Switch but there are certain exceptions and Pokemon and Zelda were allowed to temporarily bump it. Now I got the Pokemon DLC for Christmas so SMTV got bumped again. I appear to be at the very end so there's not much left.
The game is really long and pretty hard, at least compared to the typical RPG I would play. I like it a lot but it's kind of gone on too long and I want to wrap it up. I've also been resisting switching the difficulty to the easiest setting which would presumably let me finish it quicker but I've been over 100 hours in without doing that so it feels like a cop-out to do it now.
In that sense, I don't really feel like buying a second version of the game. But the first SMTV ended up becoming pretty cheap. I paid $50 CAD a few years ago and it felt like a good deal but it has since been marked down to $30. So if Vengeance gets marked down to a low price, maybe I would consider it. But then I don't think SMTIV Apocalypse ever became cheap and it's now very pricey. If I got the game on a low price then I figure I would play through it on the easiest difficulty, just to experience the gist of it without committing another 100+ hours.
Ideally though this should be DLC. In modern times it makes no sense to double-dip on games when everyone else lets existing owners upgrade.