Why did KyoAni decide to make a new movie of this?
Because it isn't their IP.
Kyoani doesn't do contractor work anymore.
Maid Dragon is an exception, and even in this case they lead the production committee (invests the most money and gets therefore the largest returns).
But what's the point of the show after that?
Optimistically I want to think this. Kyoani is about to enter a new era of masterpieces every season, but before they can do that they need to wrap up all their ongoning franchises so they can clear their mind of old anime and concentrate fully on their new era.
More pessimistically, Kyoani is struggling and have nothing to adapt, and haven't yet understood that their old anime isn't that good anymore. Their new movies will flop, Kyoani will have no work and they go bankrupt. Alternatively it could represent Kyoani abandoning the TV market.
They have a new crop of LNs they promote on twitter.
> Kyoani is struggling and have nothing to adapt
It is true that they have nothing good to adapt, but they aren't struggling.
Maid Dragon is quite an interesting case with Kyoani leading the committee, and likely being the company that initially wanted to adapt Maid Dragon. Though this only works for niche manga/LN.
They're just finishing up season 1 Kyoani.
Season 2 Kyoani will be Violet Evergarden, this >>161427375 and