The thing to watch out for is the "half lazies", where you have the motivation to make stands but not to make them as solid as they should be.

There are probably more "three pieces of wood nailed together" stands holding heavy speakers above our kids and pets than anyone would like to admit.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8