I played around with it, mostly typing in a bunch of DOS search terms. If this search engine is working the way it's suppose to.. I should have thousands of very old results. After a single page or 3, I was quickly looking at results from 2006/2007.
This might have been a problem with the search engine or a (more serious) problem with Google throwing away much of the past. We already know this is a problem. We just don't know how serious it is.
A recreation of Google would involve reindexing to include what Google (DDG/Bing and others) have abandoned (the recent past).
PS: I use https://wiby.me and https://yandex.com with much greater success in finding older material.