I don't know why I need dual-boot them, plus I am not comfortable to run ubuntu on my small screen devices, though I loved it when I used it for linux developme

I don't know why I need dual-boot them, plus I am not comfortable to run ubuntu on my small screen devices, though I loved it when I used it for linux development env(and LTS server) on PCs. Now I'm switching back to Debian, first server, then desktop, somehow I think Ubuntu is stretching too thin and lost its focus, you can't do everything at the same time, not to mention ubuntu is still a pretty small company.