Everyone is different, and each of us has a different tolerance for initial investment vs long-term costs, maintainability, compression strength, reflectivity, etc.
My garage uses the same epoxy flooring as many of the NASCAR shops I visited in the Charlotte, NC area. They use it to keep their shops clean, bright and attractive for the staff and sponsors. I first saw this at a Busch series shop while dropping off a truck I sold to them. I got a tour and was really impressed with the entire operation. Nothing in the shop was done on the cheap- they wanted the best, and they evidently had it.
I asked them where they got the floor and after some research, came to the conclusion that, for me anyway, I wanted to do the same thing.
The materials for my < 800 ft garage were around $2000 all up, including sandpaper and sander rental, which seemed reasonable to me, especially as I was getting quotes of as much as $6500 for an installed floor I thought was of lesser quality.
I got the materials at Precision Epoxy and it took me about a week (a little more, because of a mistake I made) to install.
For reference, here's a picture of one bay in the garage.
Not saying everyone has to do this, just that I found it to be a great solution for my requirements.
-Will