That was certainly an issue for Voyager, though Enterprise did have an element of serialization pretty much right from the beginning. Granted, the first two seasons were largely episodic, but there were plot threads which ran during those seasons. The lamented Temporal Cold War, the tensions between the Vulcans and Andorians being the most prominent, though we also had things like the Space Boomers on freighters and the Tandarans imprisoning Suliban and later seeking revenge on Archer as well as Archer gaining a reputation because of his actions at their detention facility, Granted, these all had only lip service paid to them in the second season if not dropped entirely, but then that season had to contend with executives asking questions like "what is the hull?" so it goes without saying there was some shit going on behind the scenes that year. They did still manage a small loose arc of Archer being a wanted fugitive by the Klingons towards the end of that season.The greatest flaw of the Berman-era was that the later two series were trapped under UPN middle management holding back serialization until it was too late.
Serialization wasn't a thing when TOS was on the air. It was a thing when TNG was on the air and I'd argue TNG's refusal to include any serialization has worked against it in the long term.TOS and TNG did just fine without serialization.