I dont expect to replace the platform itself + mast unless I run the boat aground or something similar. Sails, rigging, trampoline etc. are all things that needs regular replacement in my opinion.
The olympic Tornado beams replaced beams becouse the believed they became softer after x->N number of cyclic loads when sailing. Not proven as far as I know, but re-seating the beams usually makes the boat stiffer. Marström tornados built after 1986 lasts virtually forever btw.

The question as I understand it is not how long the boat is top competitive but how long you can sail it if usage is "normal". I totally expect this to be 20+ years.