I wore micros for 4 years. Most recently I had them this year from April until June. Six months is way too long. I pushed the limit by going 10-12 weeks tops. I wore them from pencil sized down to teeny weeny hanging to my butt.
I never experienced any hair loss and I always take them out myself. Lots of water, detangler and cholesterol. No problems. I also went to the the same braider who was the owner of the shop. Never lost my edges and never had a braid snap off. She would never let anybody keep braids in for that long.
This year was the best experience I had with them because I took care of them just like my hair. (I have always used human hair but I used to do nothing but wash) I cowashed or rinsed every other day. Deep conditioned, moisturized twice a day and even whole head baggied. I had the best growth I ever had with them. If I had known all of the hair care methods I have learned here I would probably be sitting on my hair by now after all of those years! I'll probably do it again when I get tired of doing my hair myself. Pencil sized and no longer than 8 weeks.
ETA: My hair was always relaxed during this time. I would take down the braids, touch up the relaxer, get them redone.
ETA: I think I misunderstood your post! I thought you meant wear the same ones for 6 months straight! Now I get it....and of course I vote sure! I did it for 4 years straight. Sorry for the confusion! I'm going to bed now!