I would prefer to keep a blog, probably using github project pages. It is more customisable (it's true medium offers a clean UI without any effort), and GitHub

I would prefer to keep a blog, probably using github project pages. It is more customisable (it's true medium offers a clean UI without any effort), and GitHub has given more proofs to stay alive for a long time. On GitHub pages, you own the content, and it's fairly easy to adapt to new platforms if you wish to change. If you wish to change from medium, is it easy?