I would go so far as to say Vulcan development has been more consistent over the years whereas Klingon worldbuilding has been a little more erratic. Andorians came off initially as another aggressive alien species. In some ways the statist-militarist Andorians of ENT are a substitute for TOS Klingons (as were Cardassians in the TNG/Berman era). Maybe that's why I like them so much. ENT Klingons reverted back to Berman Era biker gang. DISCO Klingons became a feudal society.Enterprise covered Vulcans and Andorians, Discovery has had tons of Vulcan stuff too.
Do Klingons go through cyclical world cultural phases or are they just constantly trying on various phases of being galactic douchebags? Was having extra genitalia and double nostrils an optional thing during the Disco era? How in the world did Jadzia and .. nevermind. I maintain Klingons remain more mysterious and by mysterious I mean there is a lot about them by this point I really don't want to know.
I would like Bolians to finally get their moment.