At my last job, this was the attitude we eventually took with tickets that were several years old.
If it's still an issue with our internal customer [0], they can reopen the ticket or open a new one. But we've completely rearchitectured our systems since the ticket was first opened, our internal customer has changed leadership and has had considerable staff turnover, and not a single person has brought it up in our biweekly meetings with our internal customer for ages, so we might as well just close it out.
[0] when I say "customer", I'm talking about a department, not a single individual
If it's still an issue with our internal customer [0], they can reopen the ticket or open a new one. But we've completely rearchitectured our systems since the ticket was first opened, our internal customer has changed leadership and has had considerable staff turnover, and not a single person has brought it up in our biweekly meetings with our internal customer for ages, so we might as well just close it out.
[0] when I say "customer", I'm talking about a department, not a single individual