It's because Electron has taken over desktop app development. While it does significantly lower the knowledge barrier to building desktop applications, it does come with a heavy memory overhead.
a. A smaller executable that makes efficient use of your machine's resources
b. A developer with less knowledge and experience who is able to write a memory-hogging desktop application
It's a pity, because Lazarus does seem fantastic for desktop application development...
Whether you consider JavaScript a sane language is up to you. :)