Digimon absolutely stopped being relevant and hasn't been for years at this point. It had its zeitgeist with Digimon Adventure and Digimon: The Movie, and went on free fall from there. None of the games were truly well received (not even the first World game, which became a cult classic), and the anime faded into obscurity. The fact that every game and TV series was its own thing with wildly different characters, setting, story, overall mood and even target audience didn't made them any favour in attracting and retaining fans.
It's only been recently with Tri, the new TCG and, more importantly, Time Stranger that I've seen people talking about Digimon again. I hope this serves as proof to Bamco that Digimon can be a relevant IP if they bother to invest money on it.