My thoughts on conventional setup:
- if you depend on AC or cooler or fan, a power-cut is likely to disrupt your sleep
- noise generated by AC/cooler/fan has an effect on your sleep and also your mind
- mattresses insulates heat and you need AC/cooler/fan to cool you down
The thought of sleeping on hard surface could be uncomfortable but once you get used to it, you may never want to sleep on a mattress. I personally believe sleeping on hard surfaces helps improve blood circulation and reduce fat accumulation to an extent. Don't ask me how, but I feel it does. Also the temptation to oversleep gets curbed.
There could be thousands of people who sleep on hard surfaces, yet I thought I should share the experience. Final thought- this setup is cool and green.