Jon Bon Jovi is pretty frustrated with longtime band member Richie Sambora’s departure from Bon Jovi – but he isn’t afraid of outing his issues or saying that he is replaceable.

The 51-year-old rock star recently opened up about Sambora’s shocking departure from the legendary band, hinting that it had to do with substance abuse problems – and Breaking Celebrity News has the details.

“It’s getting more and more difficult every day to not just sit here and say something... Because all I can say is this — it’s for personal reasons,” Jon explained to the Standard about Sambora, who went to rehab in 2011 for alcohol abuse. “He’s been through it before, fortunately for us the same guy who filled in last time was available this time.”

He continued to snub Sambora by comparing him to U2’s The Edge, who would not be so easy to substitute.

“Life goes on, so if someone chooses not to be here... unl