I am going to be the outlier here.
My welding bench is only about 24" high, and not just because I am short (66"). I find
that if I put a medium-sized piece on the table, the height comes up to just about ideal
for me when I am standing, and it allows me to weld small objects sitting down. I am
usually standing, however.
Big projects, I leave on the ground, or elevate only part of it on whatever is handy.