I'll probably be dead in ten years! Longest I ever kept an arranger was no more than three years. PSR8000, PSR2000, and Roland E50 lasted the longest, although they became backups to newer ones along the line. The PA3X has been around more than two years now, as was the Audya.
Ten years? Nope, not unless they quit making new ones or I go too broke to get one.