Also I think you are underestimating how crappy and broken a lot of hardware is. See eg. https://gitlab.freedesktop.org/libinput/libinput/tree/master...
or read some of the comments here, lots are about ACPI https://elixir.bootlin.com/linux/latest/source/drivers/pci/q...
Has anyone bought the libinput maintainer your laptop hardware so he can work out why it doesn't work? You can see from the commit log that it's mainly developed by one person, who also developed the previous Linux (synaptics) touchpad driver for years before that.
It's an early attack toward making the PC platform move toward ownership and control of Microsoft, well before UEFI or Secure Boot.
Combine this with the modern trend of some hardware manufacturer's refusing to release details needed to create drivers unless NDAs are signed, which wasn't something commonplace in the early 90's when Linux (and Windows NT) was born, and this creates the situation where things don't "just work" on Linux.
With the proper hardware information and without a bad firmware interface like ACPI in the way of the hardware, the only limit is whether someone is willing to write and maintain a driver for it.
I support desktop linux up to the point where I'm willing to use it, and contribute if I am using, but, I'm not replacing everything I own for an experience that's already proven to be bad. I'm not really convinced the problem is hardware, I think there are cultural/organization/design problems here. It shouldn't be hard to have multi-monitor support for a login screen 15 years after it's been a common setup. I shouldn't be battling with ACPI issues when ACPI is a standard that's been around since like 1996. I'm willing to be forgiving about things like graphics drivers or other things that are on the cutting edge with manufacturers that are mostly indifferent, but we're talking basic functionality. Even though I'm sympathetic to the manpower issues it doesn't change the fact that it's not really usable and telling people to buy new computers isn't a good solution.