I love my gravel bike on single track. Coming from a MTB background, there are a lot of trails that are just too tame (for me) to ride on a mountain bike. But on a gravel bike, "tame" trails are a ball. Anything that is appropriate for a fully ridged MTB can be a ball on a gravel bike - besides my bike (at 17lbs) climbs like a mountain goat. I just have to pick my lines with more care (like we did in the early days of mountain bikes).