I left back in 2015 after realizing that, had I stayed in the US, I probably would have killed myself. I haven’t renounced so that I can help my parents (and, yes, I keep voting), but the punishing tax and retirement investing issues make things a huge pain. So much paperwork everywhere, can’t invest in things, potential double-taxation, hours of forms to fill out for a country I’ve spent ~15 days in in the last decade, etc.