Why did the show end when it did? (1996)

For the purposes of this question I’m talking about the 1996 ending, not the newer episodes in the 2000s.

As I was but an ankle biter when this episode was released, I wasn’t aware of the backstory of the show. So I was wondering if people remembered why it was decided to end the show and have the Trotters become millionaires at this point? Did JS and the rest of the cast/crew decide they’d done enough? Were ratings down? Did the actors’ availability become difficult? I’m just interested to know if there was ever talk of doing more specials back then or if JS decided he’d written enough and this was the perfect time to finish?