I still use open and peep sights but nowhere near as I use to, mainly due to aging eyes. I have used scopes for many years and yes in low light, distance or in some vegetation they are an advantage. Also with ageing eyes I find I am using 4 and 6 power settings for 200mt or longer shots more. Never really used 4 power for much. Just think 4 power makes something at 400mts look like it is at 100mts.

I agree with John, Daryl and others that shooters should learn to use and become proficient with open sights first. Then learn to use scopes.