I use my slide area with the slide in all the time , as the coach is easier to heat with the slide in.
Some owners , with tile floors, report tiles cracking under the rollers, would this happen if you were not using the slide area, when it was in ? Not sure.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.