i recall both coinbase and kraken rebuilding their engines to handle much bigger scale in response to the 2017 outages. that's definitely a good thing for USA residents because there aren't many legit fiat gateways. there's gemini too but they have high fees and disappointing volume.
their new engines haven't been put to the test yet re another bubble like 2017 though. so we'll see!
Well, I've waited for a long time for a new Kraken engine, but when they've rolled it out - it was a complete disappointment.
If you look at
https://status.kraken.com/ - you can clearly see that API response time NEVER falls below 600 ms.
I believe this is unacceptable in the modern market (and for exchange which has been around for a while and secured some serious funding)
On a positive note - during the current active market - response time did not skyrocket as it did before (up to a couple of seconds)