I worry a bit about the challenges high school might yet provide.
That's my worry too. Dd12 has maintained straight As throughout an IB MYP middle school with accelerated/GT classes for math and literacy the whole way through. I do think that there is some benefit to learning to deal with the fact that life isn't going to always give you extra time b/c you are slower, but I'd hate to have her grades drop next year in high school when they will count for college applications. I'd hate that to be the year where she is suddenly thrown into the fire w/out an accommodation she's grown accustomed to having.