Honestly i didn't write all that much, but i want to tell you how much i love the way your characters act and interact with each other. How they notice and react to the things the MC does or introduces, how the slave and master power dynamic feels real and absolutely right. I've read a fair bit of novels with slavery and "hohoho I'm a kind guy to this abused girl so it's natural she loves me"  but here it works, the kindness, the gratitude, the saddaq makes sense to me. 

 My personal favourite is the reaction to the Arabic numbers and how much they affect maths, a lot of isekai novels introduce stuff like maths, economic and languages to other worlds but don't really understand or portray how big these things actually are. I love the amount of work you do in writing this. Thank you for all the work you do.

P.S. had to split this in two as we apparently have a 500 character limit.

You are right on the money about the work, heh. What pushed me to write was a similar story with technological uplift, but MC there just used magic to create high precision screws and start the industrial revolution in an hour, despite metal magic being common in that world for centuries. And that threw me off so violently out of immersion that I promised myself to do as much as possible to make my story real. including research, but mostly Youtube.