Just answering for myself, but it's because I like the programming/engine aspects. Not the creative aspects of the art/music/level-design/rules/balance/etc. I c

Just answering for myself, but it's because I like the programming/engine aspects. Not the creative aspects of the art/music/level-design/rules/balance/etc. I can use an existing games art/content and just focus on the part I like. Plus nostalgia.