I replaced a 15 year old Metz-type antenna and the run of coax to it. The antenna came off in pieces and I knew from research that the old coax had been superseded in the market by better product.
In the whole scheme of things (a re-rig) it was cheap. We pulled new tinned wired thru and replaced the UV-damaged anchor, steaming and foredeck lights, too.
Far easier (and a lot less labor intensive - i.e. costly) to do this work all at once, with the spar horizontal.
Mind you, all this stuff worked to some extent before the replacement/upgrade.
It has a useful-life-span, like all the systems parts on a boat.
You may be pleasantly surprised at the increase in range when you then make and receive calls on your VHF.
Sidebar: You did not ask, but since it's winter and unsolicited advice is free on the internet, take your VHF radio in for a free check up in the off season... I would imagine that most reputable marine electronics shops will do a no-cost bench check for you.......
We have an excellent shop here that's been doing this for decades. They keep handing back my '88 Furuno radio and telling me to keep on using it - no freq. drift and up to rated power output).
(I asked if they were ever tempted to say it was "showing a diminished thermothrockle output" and then sell me a new one. They laugh and say they do not do business that way!
One of these days I will probably get a new fancy DSC radio, but for now, it's a "feature" that I do not need.
LB in PDX