Many houses are still selling (going under contract) very quickly, sometimes with multiple offers.

Some houses are not.

Frequent feedback on houses that do not quickly go under contract is something along the lines of...

We like the house... and the purchase price could work for us... but it's at the top of our price range... and we would want to (or need to) make a variety of further updates or improvements after closing.

And so... these would be buyers of the could be home... don't make an offer.

If you are in the process of selling your home, and you are getting this feedback (like the house, price is OK, but would want to make updates) this can almost always be translated into or better understood as... your list price is too high.

Oversimplifying a bit...

If a 2400 SF home is listed for sale for $500K and a buyer is comfortable paying $500K for a 2400 SF home... but they would want to (or need to) make $20K - $30K of improvements after purchasing the home...

...then they are not going to be willing to pay $500K for the house.

If your house does not go under contract quickly once it is listed for sale, patiently sort through the feedback... but understand that much of the feedback (particularly the feedback described above) can be translated into feedback on your list price.