Dropping tools, dragging stuff, most of that can be handled. Welding is a bit different, we suggest that the tip be kept 3 feet from the floor, or use welding blankets.
In a heavy use shop over time the clear coat is going to gather a few battle scars, so when you know the in-laws are coming over, and you dictate that they need to sleep in the garage, you may want to freshen up the floor first. Usually that just entails scuffing up the existing floor, wiping it down with denatured alcohol, and putting on just a layer of the clear coat.
But if even that's too much effort for mom in law, a worn coated floor still keeps down the concrete dust, avoids stains, easy to wipe up spills, reflects light, avoids excessive chips and divots, less efort to sweep and clean, and although no longer showroom is still a lot more attractive than a stained scarred concrete floor.