Is umbrella insurance enough or am I missing something?

I’ve always been told that once you start building assets, the move is just to add an umbrella policy on top of your home and auto and you’re covered. That’s what I did. Right now I have around $1.7M in total assets, a standard homeowners policy, and a $1M umbrella.

But the more I read, the more I’m not sure if umbrella actually solves everything. It seems like it mainly helps with liability, but does not really address things like rebuild cost gaps, higher-value items, or how claims are handled.

I’ve been looking over this high net worth insurance as being more of a full, tailored setup instead of stacking policies, but I cannot tell if that is only for ultra-wealthy or if it starts making sense earlier.

For those who have looked into this, is umbrella actually enough in most cases, or did you find gaps that made you switch to something more comprehensive?