Silica Gel doesn't last 10 years.
Silica Gel absorbs water, and store room is usually very humid. After the gel has absorbed the max, it is actually a water source, i.e. more humid. If you never replace the gel, it cant absorb anymore water. I think likely you will see spiderweb patterns (fungus) and may have to pay a lot of $$ to get them cleaned. Likely that the coating will also be damaged, so not very economical.