Kindle versions of most of the tech books would be $21-23 all the time (in the US), vs $39 for the DRM free format. You give up freedom for that $20 but also gain some convenience (frictionless buying process, library management). It is an interesting revealed preference when both are offered which sells at what price.
It would be a no brainer to check a box and get DRM-free vs DRM for the same price. I'd probably pay some premium once I get something (Calibre?) to manage other formats as well as I can manage kindle today, especially since stripping DRM from the latest Amazon format is more challenging than before. But as someone who reads 100+ books/year, it would be hard to justify paying 2x the price for the subset of books I only read once.
It would be a no brainer to check a box and get DRM-free vs DRM for the same price. I'd probably pay some premium once I get something (Calibre?) to manage other formats as well as I can manage kindle today, especially since stripping DRM from the latest Amazon format is more challenging than before. But as someone who reads 100+ books/year, it would be hard to justify paying 2x the price for the subset of books I only read once.