There were plenty of people who died in the Crisis who weren't written out of history or anything. Barry Allen, the Losers, Dove, Tula, Kole, Prince Gavyn, Prince Ra-Man, Mirror Master, Sunburst, the Icicle, Immortal Man ...
There were others who were retconned away or rebooted, but a lot of people are just remembered as having died in a big ol' Crisis.