The question of whether small independent players like Illegear or Level51 has the build quality to last 5-7 years, is a good question. Personally I wouldn't get those even though some will say you get good specs at more affordable pricing. Yes, even for the more notable brands the gaming laptop might be relegated to Office work and browsing after many years, but the expectation is different.

If I want a high spec affordable machines for the shorter term (say 2-3 years) then look at upgrading, then Illegear or Level51 might be fit for purpose. Many other factors at play as someone else pointed out, but for 5-7 years longevity, I wouldn't bank on them.