not gonna disagree with you, but, as a solo developer who needs to reach audiences of all sorts, from mobile to powerful servers, the most reasonable choice today is Javascript. JS, with its "running environments" (Chrome, Node, etc.), has done what Java was supposed to do in the 90s. It's a pity that Java didn't hold its promises, but the blame is to put all on the companies that ran the show back then (and running the show now).