Adobe Photoshop users, how much RAM is sufficient for a smooth experience?

I currently use a Surface Laptop with only 8gb RAM, I can't really run photoshop on it without it being super slow/ eventually crashing. So I have to do all my creative work at the office. I want to upgrade my laptop but want to make sure I get sufficient RAM this time, and I am also looking at a macOS product this time. Any suggestions would be helpful! Thanks