tl;dr: - Don't depend on other people's software services. - Buy a domain and host your own website. - Don't pick a sketchy TLD or registrar. - Mailing lists beat social media accounts. - It's okay to depend on a cloud. I had the belief that the article was going to say the exact opposite wrt. cloud hosting. You're literally renting space, and if your stuff gets any heat, your cloud provider may simply shut you down…
Likewise, if you're using Cloudflare as a CDN (and only as a CDN!) there are other CDN providers available that you could switch to with relative ease.