We are, DHs 401k has a good stock index fund that has a 0% ER, plus a good match, AND they profit share. So, that's a no brainer.
We also max out IRAs for each of us each year. We have both a Roth and trad, different things go in each, depending on tax implications. Now, I am a newbie and just learning, so take what I say with a grain of salt/educate me at will. But we have our bonds and REIT in the Roth and VTSAX in traditional.
After we fill the retirement funds to the max, we fully fund the HSA, which has a low ER an offers a good stock index. We also do a 529 with vanguard for the current child and once #2 arrives we will open a second 529. These will get $1k/yr MAX.
Beyond that we are moving to taxable accts and rentals real estate.
We have $$ goals for taxable accts and retirement accts, and hope we can also throw in a house to live in, plus two rental properties.