It really depend on what you want to do - Linux distro on x86 is IMHO good start, but of course its not the only option - there are now some reasonably open arm devices (including an atm laptop) from pine, there is the very open Tales workstation running on Power & RiscV showing up everywhere.
Why do people make these kinds of comments? Talos isn’t showing up anywhere, and even during the Kickstarter it was more than $3000 for just a motherboard.