Well, I find it in my listening room. I have about 500 tapes. In general there are two ways to go -
finding older prerecorded stuff on 7" reels at 7.5 ips and 3.75 ips quarter track that can be equal to, better than or worse than an LP version of the same recording
modern offerings on 10.5" reels at 15ips two track by various labels that have come about since we started the Tape Project in 2006. These tend to be superior to LP versions of the same recording, or at least offer a different seasoning to the same stew.
Regarding cassettes, same story. Some are quite good some are terrible. In general they don't stand up to good reel to reel releases. There are new cassette issues being produced. Nostalgia for old formats was quite underestimated and it has taken some time for the old manufacturing processes to get back up to significant output levels. But new pressing plants and to a lesser degree duplicating lines are appearing at a surprising rate.