I have no lids on my tanks. I do water changes 2-3 times a week (more towards 3 times than 2), so evaporation and dust are not a concern. I have had 1 fish jump, but I saved him and he has been reluctant to do so again. Lids annoy me, they get dusty and water stained. Condensation builds up on them. They get in the way.
P.S. I have mostly bichirs.