I hate "Magic as Everyday Technology"
I detest when they want to make the world look like a medieval fantasy, but they don't go full on Fantasy and create stupid magical appliances or have most house have mysterious indoor plumbing that works. If you're going to go medieval, go fucking medieval. Don't create convenience for your characters, the important thing on an Isekai is putting the character in another world, not just a Disney Theme Park version of a Fantasy Setting