Japanese anime fit themselves into a rather rigid formula.
There are four anime seasons a year: January to March, April to June, July to September, and October to December. All anime seasons run in parallel to each other. There are 12-13 episodes per season unless something went horribly wrong in the production process. Some shows that are received well will received additional seasons (although sometimes two consecutive seasons are called a single twenty-four to twenty-six episode season).
Each episode to 23-24 minutes long, including a minute and a half long intro sequence (sometimes after a cold open) and a minute and a half ending sequence (sometimes followed by a few seconds about the next episode or a post-script sequence). There is a suitable place for a commercial break about half way through. Sometime an episode is broken into two or three mini-stories with commercial break spots between them.
The evolving U.S. and streaming driven model of experimenting with series that have different lengths (even within the same series for different episodes), start at different times across the year, and can be terminated mid-season if ratings are poor, mostly hasn't spread to Japanese anime producers.
(There are also sometimes one or two 3-5 minute short episode series in a season, with the same number of episodes aired weekly, presumably distributed in a different medium.)
There are also plenty of genre and sub-genre conventions that they follow.
Anime fans decide at the beginning of each season which shows they plan to watch for the season sometimes sampling a lot of them for a week or two until they hone in on the shows that they will be following. If you dread watching the next week's episode somewhere mid-season, sometimes that show is dropped as well.
Fans generally know what they want and pick accordingly, although sometimes a highly hyped new series will lure someone who normally wouldn't watch something in that sub-genre or with its notable elements.
But, this can go awry. Suppose you like sweet, high school rom-coms. Depending on the season, there might be several of them available and standing alone, they might all be reasonably enjoyable. But if you cue up too many of them, and too few other anime types to provide variety, it can be overwhelming and you can get sugar sick from too much of a good thing.
That's me this season.