How
long a machine lasts is primarily down to how you use it, number of cycles or how long the drum is rated to last which is a secret. Build quality is more or less the same for these machines with the only extras being more capacity and features. More capacity means less use as you get more done in one wash within spec.
Entry level machines are around the 1000 cycle mark, that is once a day for a little over three years.
Mid range as in the ones made in Germany or Korea rather than elsewhere last around the 2000 cycle mark or six years.
I think you can pick a figure in between to get an idea of how long it should last provided you do not over load or have hard water. Found people here told me they have managed to get 6-8 years of use. So there is variability and pushing over the 2000 cycle mark is possible.
Found some one with the same model as yours got a drum change done in three years as well. This is with 4 adults and a kid running 15-20 washes per week. Did you have this kind of use ? thought your loading is half that amount.
Current machines allow you to change spin speed. The idea here is slower speeds put less stain on the drum. Since we live in a warm country, drying times are shorter compared to colder countries. High humidity will affect this though.