Earlier quoted context omitted.
Short answer: today I think there is genuinely nothing that anyone should use oracle for, but their database used to be seriously far ahead of the competition. A very long time ago (circa 2000) there were basically 2 databases that worked for use cases where you needed high availability and vertical scalability and those were Oracle and Sybase and Oracle was really the only game in town if you actually wanted certain…
I disagree as I was running clustered sql server 6.5 and 7 in 1998 for hundreds of concurrent users doing millions of reads per hour on NT basically commodity boxes. Replaced it with Oracle for 100x cost and lost performance. I think even back then you were usually better off with distributed databases running mysql or postgres over Oracle. Although people liked to think a giant Oracle db was better.
Assume that means 5_000_000/hour. 5M/hr => 83k/min => 1400/s. That is impressive for late 90s. I was generous on what "millions per hour" meant, but even if its 2.5M/hr that would be 700/s, which is still quite good.