If men learn this, it will implant forgetfulness in their souls. They will cease to exercise memory because they rely on that which is written, calling things to remembrance no longer from within themselves, but by means of external marks.

Plato against writing

If you don’t want to go full Cloudflare you can mitigate DDOS using these kind of technique locally.

https://blog.nginx.org/blog/mitigating-ddos-attacks-with-nginx-and-nginx-plus

Cloudflare will be a lot more effective in case of attack. But I don’t think most people need more than a few mitigation rules. If DDOS really come, there are very few things you could do to mitigate anyway.