There are modern alternative systems with an open firmware stack, for example the Talos II running Power9. Granted, it is not available as a cheap, slick and slim power efficient laptop, but it is real, only twice as expensive and very capable. https://en.m.wikipedia.org/wiki/POWER9
See performance benchmarks incomparison with AMD/Intel at: https://www.phoronix.com/scan.php?page=article&item=power9-t... https://www.phoronix.com/scan.php?page=article&item=power9-t...