>>1521430Then your question morphs into a "generational" difference question. Today's fans are quite a bit different from the boomers and older. And the consumer styles changed from reading into grazing for USA consumers but USA fans still read. Grazers versus readers matter as they have different perspectives on characters changing or not changing after decades.
>>1521308>it showed comics being stuck with the same characters like spiderman and superman for decades while mangas went through many different characters over timeAre you referring to a comparison of the FREQUENCY of release on mainstream titles or to how many new characters were being introduced in the USA comics by dc/marvel?
As for frequency of new chars, there had always been independent comics with a large variety of characters. But if you were referring solely to mainstream comics like DC and Marvel introducing new characters, they also had a variety of characters and NEW characters were introduced every month but many such newbies were just unpopular.
So the USA marketplace was not "stuck" with the same characters such as spidey or superman for decades. It liked the same familiar characters undergoing different adventures and evolving as durable reliable good versus evil MORALISTIC people. In comparison, the manga world had reliable regulars like Atom Boy from way back and onwards.
Perhaps you should look at the history of manga book by Frederick Schodt for perspective on long-lasting japanese characters.
https://en.wikipedia.org/wiki/Manga!_Manga!_The_World_of_Japanese_Comics 
