Can you please elaborate ? SV seems like the place to be, but I lived in a cheap french city for the past 5 years, and I'm sure living in SV has its downsides

Can you please elaborate ? SV seems like the place to be, but I lived in a cheap french city for the past 5 years, and I'm sure living in SV has its downsides in terms of quality of life. Bonus: please include numbers :).