Compared to back before enduro took off, definitely. Unless you were willing to spend stupid money on a carbon full face all you could really get then was DH full face helmets that were basically just motorbike lids without a visor. Impossible to breathe in, hot, sweaty, heavy. Just super uncomfortable to wear.
I have a Fox Proframe and it's so light and well ventilated that I can comfortably wear it all day at my local flow trails. My only issue is I have to wear goggles with it or it feels too loose, and goggles get scratched/steam up.
I've worn it at trail centres before to do reds/blacks. In those cases I take it off and strap it to my backpack for the fire road climbs. I guess there's a small risk I could somehow end up nailing my head on a smooth fire road climb, but I can't see it.
FWIW the worst crashes I've ever had have been on the easiest trails imagineable - like farm tracks and stuff - just not paying attention and in the blink of an eye I'm over the bars and landing on my head. Was quite lucky I didn't sustain any facial injuries with this one (OTB at 30mph). Still I can't see myself ever wearing a full face for XC/downcountry stuff, but to each their own. I stopped caring about what other people wear when I was a child.