I know, everybody has an opinion, so here is mine
The 5 smaller slides was one of the layout items that attracted me to the 38FL.
My past experience with 5th Wheels with large / long slides is they can be more problematic due to their size and weight but also knowing we wanted toppers for the slides, for me the shorter slides / toppers also seem to be less problematic and work better.
Robert & Sheryl
2014 Redwood 38FL
MoRyde 8K IS, Disc Brakes, MoRyde Pin Box
17.5 Goodyear G114's, RV Armor Roof
2018 RAM 3500 DRW, Curt Q24 Hitch