in some ways it is harder to make the switch to buy side the longer one stays on the sell side, there is a bias on the buyside to working with ‘moldable’talent, the perception is that the longer that one works sell-side, the more rigid and static a person’s investment process is making that person less attractive to buyside firms
that said, sell side equity research is a good place to work for 2-3 years before making the jump, the original poster’s 5 years may be a turn off for some organizations based on what I’ve seen in the past
in any case, making the jump to buyside is extremely competitive even for former sell siders, so good luck original poster