Cockroach DB: trade some performance for geographic redundancy. The trade off may work in your favor - e.g. read heavy workloads (or not).
I plugged in CDB I place of Postgres for some testing this week, was surprised it worked so well.
This is almost never the case, and CDNs are no exception. A CDN like Cloudflare that reuses your domain(s) means that they become just a useless point that your dynamic requests have to travel to and from the main server. A CDN that uses its own domains requires extra DNS queries, extra TCP & SSL connection setup, etc, plus it only starts loading when the browser has started processing the HTML.
There are also http headers that can instruct the browser to fetch cdn resource before the html is delivered.
This was a huge win for QoS on cache misses, which were a significant portion of our traffic. There are tons of tradeoffs to make this happen which is why we couldn't find an off-the-shelf solution to deliver the same results.