How busy in life are you that we're concerning ourselves with nearest DNS? Are you browsing the internet like a high frequency stock trader? Seriously, in everyone's day to day, other than when these incidents happen, does someone notice a delay from resolving a domain name?
I get that in theory blah blah, but we now have choices in who gets to see all of our requests and the ISP will always lose out to the other losers in the list
Even something simple like www.google.com serves from 5 different DNS names. I have seen as high as 50. It is surprisingly snappier. Especially on older browsers that would only have 2 connections at a time open. It adds up faster than you would intuitively think. I used to have local resolvers that would mess with the TTL. But that was more trouble than it was worth. But it also gave a decent speedup. Was it 'worth' doing. Well it was kinda fun to mess with, I guess.
You know, I recently went through a period of thinking my MacBook was just broken. It had the janks. Everything on the browser was just slower than you're used to. After a week or two of pulling my hair, I figured it out. The newly-configured computer was using the DHCP-assigned DNS instead of Google DNS. Switched it, and it made a massive difference.
but that's the opposite of the request to move from a googDNS to a local one because of latency. so your ISP's DNS sucked, which is a broad statement, and is part of the why services like 1.1.1.1 or 8.8.8.8 exist. you didn't make the change of DNS because you were picking one based on nearest location.
There is more to latency than distance. Server response time is also important. In my case, the problem was that the DNS forwarder in the local wifi access point/router was very slow, even though the ICMP latency from my laptop to that device is obviously low.
which is well and fine, but my original comment was that moving to a closer DNS isn't worth it just for being closer especially when it is usually your ISP's server. so now, you're confirming that just moving closer isn't the solve, so it just reassures that not using the closest DNS is just fine.
I get that in theory blah blah, but we now have choices in who gets to see all of our requests and the ISP will always lose out to the other losers in the list