From what I understand, the loss of the Torah portion of Keter Aram Soba (the Aleppo Codex) in 1948 is heavily lamented because it was the oldest preserved and probably most accurate text of Torah.
Although the loss of the original is a tragedy, was the text preserved through sifre torah written later, copied off of the original? Were the sifre Torah (and printed Humashim) of Halab based off the Aleppo Codex, and if yes, don't we have any? Did nobody copy it since Rambam?