I'm not a long time weave wearer, but i haven't experienced anything negative from my sew-ins. As long as its not braided too tight and its sewn in properly; there should be no stress on your scalp, and everything will be fine. I retain all my growth in sew ins.
With sew ins I notice that my hair thrives no damage no breakage. I'm in a install now I put it in on the 23 of April and. Leave it in till June 8 so that's 8 weeks. Then I will bun for a week and put my weave back in. I have brazilian weave in and only the perimeter of my hair out. I wet my hair every other day with elastic wo h20 and my hair seems to be doing just fine.
Like other ladies said everything is not for everyone. I have thick strong strands of hair.