swupdate.log (2006/05/05)
swupdate.log (2006/05/05) is a log file produced by an early version of swupdate on an NDEV 1.1 around May 5th, 2006 and leaked as part of ios-releases.tar.7z on October 17, 2020. It shows the aforementioned NDEV 1.1 being updated from an unknown early firmware version (the only labelled component of the firmware is "NDEV BOOT PROGRAM v0.90", a very early version of boot-IRD) dated March 13, 2006, similar to the date of IOS 0.1 to a newer version of the firmware running with IOS 0.6.5.
NDEV 2.x was already in production by the date that this file was produced, which signifies that not all NDEV 1.xs were destroyed, or at least that they continued to be used after the NDEV2.x was available. Furthermore, NDEV 1.1s were not even the newest NDEV 1.x versions (the last being 1.2), possibly implying that the presumed destruction of NDEV1s may have been haphazard, partial, occurred later than previously believed, or did not occur at all.