In California a $100k salary results in the take home pay of a little more than $5k/month. So saving ~$30k/year is roughly equivalent to saving half of your take home pay of a $100k salary in California.
That's pretty good. Please keep in mind that other people do things such as support a family or go on dates. They have expenses and may live in costly cities. Even on a salary of $200k a year that's decent.
This is pretty pedantic I suppose, but I can't resist - I assume you mean ~ (roughly) $30k? (Or of course $30k ±x, if you somehow knew.)
Saving plus or minus $30k a year is not much to brag about!