No. Both Dell and Lenovo are now selling Enterprise laptops with Linux officially available as a supported pre-installed option.
And System76 are apure-Linux operation building their own open source firmware in house to get the level of support and features they want.
I don't think x86 will die so quickly, and Linux has been getting a lot more support from OEMs recently than it has historically.
A friend of mine runs Arch on his Samsung Chromebook Plus, and there's also the Pinebook Pro. Both ARM. Both happen to use the RK3399 SoC, I believe, but there are other supported machines like the Asus Chromebook C201 as well.
I really wish I could get Ubuntu on a Samsung Galaxy Book Go, but it seems it isn't possible (?)