After witnessing Raditz and Nappa's Super Saiyan 3 transformations, Son Goku and the others returned to Bulma's House.
Raditz and Nappa also went back to their respective homes to celebrate with their wives and children.
The two had completely settled into an easy life. Training was optional now, and they devoted themselves wholeheartedly to their families.
Only then did they realize how foolish the Saiyans' old life of constant fighting and killing had been. Wasn't it better to enjoy a cozy home with their wives and children?
That was why it had taken them two and a half years just to scrape their way to Super Saiyan 3.
Meanwhile, Vegeta, Son Goshin, and Son Gohin had gone from Super Saiyan 3 to Super Saiyan 4 in those same two and a half years. The gap was enormous.
Although the two were admittedly unremarkable in talent, that wasn't why their progress had been so slow. The most direct reason was that they had slacked off on their training.
Vegeta had even scolded them for it, but they replied without a hint of shame, "We don't have any ambitions of conquering the universe. What do we need all that strength for?"
"What if you run into a powerful enemy someday?" Vegeta asked. "How will you protect your families?"
"Don't we still have Kakarot and you, Prince?"
"What if even Kakarot and I are no match for them?" Vegeta asked.
The two laughed. "Your Highness, if even you and Kakarot can't beat them, what good would our meager strength do?"
Their retort left Vegeta speechless, and he could only leave in resignation.
After that failed attempt to persuade them, Vegeta gave up on pushing them to train.
Still, seeing them reach Super Saiyan 3 made Vegeta happy. It proved they hadn't truly abandoned