But if you look at the ship's current pictures, it does not resemble the old Gorshkov.
admiral gorshkov was mainly a missile cruiser cum VSTOL (vertial &/or short take off and landing) carrier. a bit like current indian viraat, which is vstol - operated vertical landing harriers.
admiral gorshkov has been modified to STOBAR (short take off arrested recovery/landing) structure for Vikramaditya. & to do that they changed the missile deck into an elevated runway, which helps the planes to have some upward velocity before they are left in the air.
they say 80% of vikramaditya's is new. but there is the 20% old stuff remains, which i dont know details about.
when talking about military hardware date of commissioning is the standard not date of actual completion of manufacture which in Admiral Gorshkov's case is 1987.also "30 years old" is irrelevant for a retro-fitted/extensive work done ship because it is not some food product with a fixed expiry date.to put it simply you can put a core i7 & R9 270X in a 10 year old sufficiently large cabinet & though it may not look nice it will get the job done.
kinda agreed, but things tend to loose integrity & flexibility as they age. the joints gets harder, bolts get rustier and unforeseen things may happen. its like a new piece of steel can withstand a lot of pressure and will show signs of surface bends before breaking, but old steels when they get harder, may not show any signs before they break, and obviously will break before what it could take when new.
i m not sure abt i7, but after 100yrs i am not sure, molicular diffusion will happen and internal structure may deteriorate. u can try writing something on a RW dvd today , then u try to read it after 5-6 yrs, and see if u can still read it without any errors ?

anyways it will be interesting to see how our navy operates this.