A lot of people now are frustrated with contemporary series being much shorter than they used to be. Down from 20-24 episodes a season in the 90s and 00s to about 10-12 in the 10s and 6-10 now (varies somewhat by streaming service and country). People are also frustrated with the big gaps between seasons (The Last of Us, HOTD, Stranger Things) which I do completely agree with and think needs to change.
My ideal is about 10-12. I personally really dislike 20-24 episode long series, and dislike the “monster of the week” formula that many older series used to have. At least for dramatic shows. For sitcoms and adult animation it makes more sense due to much shorter episodes and a more flippant and less high-stakes style of writing (although I don’t gravitate so-much to that type of show in the first place).
DS9 is the perfect sweet spot that they got by chance of fighting with Rick. The early seasons were more episodic and thus more character driven. This gave characters lots of growth. Then when you do that for a few seasons bam. Cool multi episode serial arcs that put even modern shows to shame with flushed out characters modern shows only dream about and becase you are not locked in to one format or the other. You can have a fun baseball episode to blow off some steam in the middle of a war.