I really hate doing all the tweaks for tablet and mobile on websites. No matter how hard one tries to design for mobile first and make the transitions as seamless as possible, there are always some “fiddly bits” that won’t behave. And so many devices with all their viewport width variations. Also, there’s the matter of people resizing a desktop browser to any width that might not be covered by the breakpoint ranges that specifically. One could write a hundred breakpoints and still not account for it all on some designs. It’s exhausting.