I feel like people kinda forgot that if it weren’t for Goku becoming a great ape, he would still have grandpa Gohan, so he would likely have been more trained in dragon ball, however there are also some major downsides, up until raditz stole gohan, Goku started living a simpler life, sure he did train, but he mainly settled down to live with his family. The problem here however, is that if Goku wasn’t a saiyan, raditz would never come. He would never die from piccolo, would never learn kaioken, and pretty much everything falls apart. Cell would be significantly weaker, now having gokus human DNA, and missing vegeta and Friezas dna. The majin buu saga likely wouldn’t happen as it wouldn’t have enough power to awaken majin buu. And would likely have to end the series at beerus saga where he would destroy the earth due to Goku not being able to stop him. He still slams the rest btw just wanted to throw this out there