Which MInecraft Server Version ? Which Software is better for little Plugins ?

I want to make a Server for some people who just want to play Minecraft the normal way.

But i always find people in comments who want the Minecraft version 1.16.5 other than 1.17.1.

Is there a specific reason why people prefer the old version ?

And which Software (Paper, Spigot) is the best for little plugins like /tpa or /home ?

Quote from Adriel

Paper is better

Is there a specific reason for this or is it just your experience ?