The temperatures you mentioned for your laptop, particularly the GPU temperature of 90C, are indeed high. While gaming laptops are designed to run hot, such high temperatures could potentially lead to premature component failure and reduce the overall lifespan of the laptop.
That being said, it's worth noting that some gaming laptops are known to run hot, and manufacturers often set the temperature limits of the components to allow for higher temperatures. However, if you're concerned about the longevity of your laptop, it may be worth considering additional cooling solutions, such as a cooling pad or an external fan, to help bring the temperatures down.
Additionally, you mentioned that you have an open-ended warranty with the retailer, so if you're not satisfied with the performance or temperature of the laptop, you could consider returning it and looking for another gaming laptop that may have better thermal management. There are many options available on the market, and you could look for reviews and benchmarks that specifically address thermal performance.
In summary, while the temperatures you're seeing may be normal for a gaming laptop, they could potentially reduce the lifespan of the components. Adding additional cooling solutions or considering a different gaming laptop with better thermal management could help alleviate these concerns. Ultimately, it depends on your personal preferences and priorities for your gaming setup.