Was HMS Hood reaching the end of her service life before she was sunk?
Short answerNot particularly; she needed a major upgrade, but that reflected rapid technological change rather than the simple exhaustion of her service life.
NotesHMS Hood had not reached the natural end of her service life before her loss. She needed a major upgrade because naval technology and operational requirements were changing around her. Obsolescence in particular systems is different from a hull having no remaining value. The answer counters claims that Hood was simply worn out or due for retirement.