I don’t remember if we had a dropper on our 20” bike. For sure on the 24”
First of all, they are a lot cheaper now. Just over $100. Second, you can move them to the next larger bike.
I am sure it depends on your trails too. Ours are rolling, especially the easy ones, even when they tend up or down, there are always short sections going the other way.
For you guys, you pedal up for a while, then rip down right? Droppers are far less of an must have in that scenario.