Familiarity can be a major contributor to confidence - it's one of the reasons we try not to change the look and feel of the site more than necessary.
This is a support site, though - new members join when their need of support is greatest and will be here relatively frequently, the more long standing members don't need the site so much, meaning that we don't see them so much. There are even some 'newbies' who have been here a long time.
It is good that people can reach out for help and support - many services recommend this site, so we do see lots of newbies - all of whom are very welcome.
*tries to remember when I was a newbie - somewhere around 1920......*