If all your work is ...inside... on level, ..smooth surface... only picking up smaller items like 3 ft or holding a end or hold a holder of something
so for some uses fine but normally a waste for the sign profession
most work done is on a platform like a plank of 8 ft or longer
I use ladders alot but are ..2 sided steps
have 2 step, 4 step 6 step would like to get much higher ones... I place at both ends put a plank in between cover a good area all at once above and in between bushes etc.
I also use scaffolding for higher jobs again 2 stages when needed with a 14 ft or 20 ft plank or what ever need for size
ladders are only here used when scaffold will not fit or work or to small of a project area etc.