I am in doubt about Adobe illustrator and Paint Tool SAI

Hi!
I have a brief question and a little fear about the Paint tool SAI and Adobe Illustrator software, I grew up drawing in SAI, I have all the binds decorated in my head and I know how to manipulate my drawings, but recently I noticed that Illustrator can be a little better for the reasons quality, more options to be used, among others. I have brushes that are exclusively for Illustrator and that left me in doubt about SAI.

In terms of quality, automation, ease, should I stop using SAI and start in Illustrator?