Interesting to note the impact this may have on privacy projects for users in France. For example Monero uses Quad9 as its first choice but at least has fallbacks.

static const char *DEFAULT_DNS_PUBLIC_ADDR[] =
{
  "9.9.9.10",           // Quad9 unfiltered (Switzerland)
  "149.112.112.10",     // Quad9 secondary (Switzerland)
  "185.222.222.222",    // DNS.SB (Germany)
  "45.11.45.11",        // DNS.SB secondary (Germany)
  "194.150.168.168",    // CCC (Germany)
};