@The5thSeraph Let's thank the fans for making the Dungeons and Dragons ending then https://www.youtube.com/watch?v=m1_6SeRRflo it was very well made, nothing bad really.
It was repetitive because of the format it had as a TV Show. I mean, if it had progression, when you lose one episode, you'd stop understanding the show, since something happened that you didn't see, and would only be able to see it again in a rerun. Every show of that time had the same format, of a single story per episode, with very little changes to the formula. I think it was Batman the animated series that introduced the "Previously in..." thing when having stories that took more than one episode, which helps, but doesn't solve the problem. Animes were always made to sell DVDs, and the TV exhibition is just an advertisement, so you could make long stories with many episodes, because you could just buy the DVD and see everything. Today with Netflix and streaming allowing you to watch whatever you want whenever you want, the problem is gone.
Going to another planet can be considered Isekai? Then yes, Thundercats is an isekai.
And yes, I agree, Fantasy worlds are good places place to visit, but not to live, that's why I consider these protagonists who don't want to go back as a pitfall. The old isekais did this right, but now, to run from the cliche, they fall in a pitfall. I remember an Isekai I saw recently that to take a bath, they used a bucket with water and a piece of cloth, no shower, no soap, no bathtub (fine, we have no bathtubs in Brazil, but they do in Japan, and the guys never miss that), ah, and there wasn't a toilet either. That alone would make me want to get the hell out of there.