One would be forgiven for not knowing of Touhou Spell Bubble, Taito's Touhou x Puzzle Bobble x music game mashup: never-ending deluge of commercial Touhou side-games aside, the game has remained Switch-exclusive since its original Japanese release in early 2020, and the eventual global release was a very low-key, "we threw together an English build for Asia so we might as well release it worldwide"-type drop that garnered virtually no attention—off the top of my head, it's the only one of Taito's return-to-consoles games that they and their international publishing partner didn't milk to death with eight thousand pointless SKUs.
(It also had the misfortune of being a local-only versus game that released on the cusp of lockdown, but that would've been a demerit no matter what; they eventually patched in online ranked and private matches some eighteen months after the Japanese launch.)
Here's some footage from a rare offline tournament held at EVO Japan a few months back—click through for a systems breakdown, and my own befuddlement at the dev support this game continues to get, all these years later:
A little over four years since the initial Japanese launch, Taito's finally wrapping up Touhou Spell Bubble—in the end, it got 49 separate pieces of paid DLC, costing ¥51150 all up. Again, I marvel at their willingness to keep pecking away at it for so long for nobody in particular, but I can't say I'm not disappointed that they never added a spectator mode (necessary for online tournaments) nor bothered with a PC port.