It's big among co-sleepers and also among the minimalist set. I don't exactly know what's anti-minimalist about having a bed frame (lol) but I can certainly see the benefit for co-sleeping -- if babe rolls off, it's just a short roll rather than a big fall. I guess the minimalist perspective could be that if you have no room to store anything under the bed, you avoid the temptation of storing anything under the bed?
Â
We are fairly minimalist but we have a bed frame (not an actual headboard or foot-board though). Where I grew up, having a mattress on the floor was considered really... gosh, I don't want to say "ghetto" to offend, but considered basically something really poor people had. Now, I don't look at it like that for other people, but for me I still have the residual mindset having grown up in a really poor neighborhood and seeing that a lot -- so we keep the bed-frame.
Â
Also, some people have a problem with mildew and such under the bed, and also vacuuming/sweeping tends to be more difficult because you can never get under the bed unless you lift it, which is a pain -- then random dust can accumulate at the very edges.
Â
Other than those considerations, I think it really has to do with personal preference.
Â
ETA: as for comfort level, for me I don't think it would be very comfortable getting in and out of it being pregnant and post-partum because I'm around 31 weeks and it's already getting to be a bit of a hassle getting up and down off the floor (playing with dd and so on). As far as sleeping, I'm sure it's probably fairly comfy.