It's all up in the air. The bigger the following for a brand, the better the support. Dell, Lenovo, HP, Asus all have good support. Even if it requires efforts like this discord. There is enough people where there are Linux focused devs that start contributing and figuring things out.
Obscure brands are a crapshoot but also tend to use generic stuff that works mostly.
In general these days, it's either custom shit from the big guys that needs extra code and kernel stuff, or Nvidia
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