I'm a huge SAO fan and my sister has Netflix. Have checked SAO. There are only two seasons on Netlfix. I have now checked other websites. You can already see the fourth season there.
Why does Netlfix take so long?
Because Netflix only sublicenses and is 80% based on local publishers.
Because they first have to get the licenses and also pay attention to the watch time so that they don't spend unnecessary money. You are already very much in debt anyway.
First of all, Corona is a big factor at the moment. Among other things, it may be that you need the right one first, and that's not the only episode series available on Netflix
It could also be that the others no longer come to Netflix.
This is not a Netflix in-house production and you have to get the streaming rights from somewhere else first. Whether they then get the license or not is another question or there's a lack of interest and accordingly no more money is spent on it.
What does sub mean?
Of course, Netflix always needs the license and the anime to get hold of. And without a subscription, that means money, that doesn't work because a season goes well over 1000. I think that's it
Subtitles / subtitles
No. Sub-licensed. They buy the streaming license from other license buyers so that it can be shown.
