Obviously the reason for the question was to determine how much you shoot ... the higher the round count and the faster it adds up for you, the sooner something is likely to break. I don't know a lifespan estimate for the Mavericks yet, but they should turn out to be roughly equivalent to the Mossberg 500s they so closely resemble. You should get more than enough time with that particular gun to either get curious about some other make/model, add a duplicate or three of the original, or develop other more pressing interests than shotgunning before anything serious breaks on the 88 you have now.
Of course there are never any guarantees with any man made mass produced product, but the Maverick is a steel on steel lockup system, all the receiver does is keep the operating parts in the correct relationship, and the only design shortcoming IMHO (and in the contract RFP the US military offered way back when) was the non-pull through magazine tube design. There are plenty of Mavericks out there not only a lot more heavily used than yours, but even abused, and they are still going strong.
Just learn to be really careful about plugged bores - ANY shotgun will let go under the right wrong conditions.
