4,188 karma · joined April 12, 2017
You can certainly make a living selling a cross platform application that supports Linux, but it's probably quite difficult to make much of a living selling Linux-only applications.
The problematic part is that the UEFI needs to support it, it seems most systems with Thunderbolt have enabled it since 2018 and systems without Thunderbolt still don't bother.
If you want to avoid microstutters associated with power savings you can adjust the minimum clock the CPU governor will set.
$750 laptop, $360 RAM, $1000 SSD. The RAM is pretty reasonably priced, but you can get your own 4TB SSD for about $500 less. $150 less if you want the exact same model they're selling.
It's a much more reasonable level of markup than RAM/SSD upgrades from other manufacturers, though of course being able to bring your own is a major selling point.
Refresh rate depends on how much of the screen is updating at once. Scrolling a whole page is pretty bad, updating a small region is reasonably quick. Some devices have an 'A2 mode' that makes it somewhat faster by just doing black/white instead of grayscale.
[1] https://maxmax.com/shopper/category/9241-monochrome-cameras