You mean "The constructed languages over a 100 years old"? There have been countless constructed languages that strived to be less European, more logical/minima

You mean "The constructed languages over a 100 years old"? There have been countless constructed languages that strived to be less European, more logical/minimalistic after the first two big ones. What sunk Volapük, and nearly sunk Esperanto too, was the creators' inability to leave good enough alone. They kept reforming it, to the frustration of the people who had actually trusted them enough to learn it (not a small investment, despite the PR). Esperanto at least was community-driven enough to reject Zamenhof's later reforms.