my health insurance is cheap
Does it have provisions for retirees, and is it likely to still exist during your retirement? That's the nut I can't crack. I have an HSA, and if I trend out my last 15 years of employment another 30 years it will have a modest sum in it, but dealing with high costs without regular income in a period where need is typically the highest sounds difficult.
A friend in her early 50s has talked about having a slim savings, and that she needs her car to last until her house is paid off in a couple years. Most of my friends (mid 30s) rent, though most of my coworkers own.
Growing up, middle class meant having a house and upper middle class meant a nicer house, a vacation in the summer, and a winter ski trip (even if only to the Upper Peninsula). Today middle class seems to be "month to month comfortable budget but no ability to budget for the future." Upper middle class is the same but with a budget for vacations and the future.