I really don't understand why there's so many reviews praising this to high heavens. But I will chip in for the first time to share my thoughts on why I don't think this is an amazing "final" installment in the saga.
I'll get this out of the way as everyone else does: I've been a fan of Digimon since I was a smol boi. Though granted, I didn't get to see them until about 2005. And certainly well after I became a fan of Pokemon.~
But that's beside the point. Basically, I love the heck out of Digimon despite its failures and faults, and have been for a long time. (Can't even help but have some merch and games, including the actual V-pet)
So let's dive into it
Digimon: Last Evolution Kizuna feels like a dead horse we've already beat once or twice before. The main driving force of the plot (the point of contention/villain/dark force) ironically feels like it was an idea stolen from Summer Wars, but with a twist. In fact, the movie from the start felt like it was trying to be the climax of Summer Wars' original inspiration, Digimon: Our War Game, while also mildly trying to keep the feel of Digimon tri. (as in, the characters we know being grown up and trying to find themselves). While overall an interesting enough idea, it doesn't feel too epic or like the villain is that big a threat since we know exactly what's going to happen. There's too much plot armor and predictability, and it is revealed/resolved too quickly. (Funny enough too, while I didn't particularly like Summer Wars, at least this aspect was handled better in that movie)
As far as the message and making Digimon go away because you grow up...well, it seems a bit contrived just so there'd be a sense of finality. It's understandable for them to do this, but it feels like they didn't make it feel very impactful.
And actually, that's my main problem with the movie. There's not enough buildup and payoff. At least in Digimon tri., I actually felt something. That series somehow hammered in the finality of losing the Digimon pretty dang hard. Say what you will about tri., but there was more to it than there was here. Certainly more development and heart. At the end of tri. (and in fact, even once or twice more in the earlier parts because of certain Digimon probably dying) I bawled so hard I thought my eyes would fall out. But not here. I'm so baffled at how anti-climactic and lacking in feels the ending was. Taichi and Yamato did have a bit of a cute moment, but there wasn't much to it. They cried, but there wasn't any room for us to cry with them. Maybe because we're supposed to understand the nature of the parting and say "well it's understandable, now you can go make your life and live, you're all grown up now. *pats on head*"
*sigh*
Overall, the animation is good, the action is cool as always, there's some nice callbacks to earlier memorable Digimon moments of the past to pull it all full-circle. Even showing the digidestined as their younger selves and all. (And there's digimon! Though to be honest, they didn't focus all too heavily on them compared to tri. /sadface) I do like that you really get to see the original cast all grown up and doing adult things like drinking and having their porn stashes, etc. (yeah that happened, haha) We're not quite sure what path the main two, Taichi and Yamato are headed in, but we know they'll figure it out now they aren't stuck in the past. It's just a shame that didn't feel too impactful, we just kind of accept that it happened.
Maybe the way you take this movie depends on you. Perhaps I am stuck in the past and unwilling to let go, which is why I expected it to make an effort to pull at my heartstrings like it should. But that's not quite what happened. It was final for sure, but not final *enough*. But, in a way I feel at the very least content that some of my childhood heroes I grew up with found themselves in this crazy world in the end.