The ideal viewport doesn't exist
> "The main point we’re trying to get across is that you simply do not know how users are going to visit your website or web app. Instead of making design decisions on strict, limited breakpoints, keep in mind the sheer amount of fragmentation there is in viewports."I don't know how useful this is.setting breakpoints allows some sanity in the build and testing process otherwise you have an infinite scope for issues which of course would be pretty lucrative for a boutique agency.> "This goes all the way back to planning your projects too. When mapping out page content, ask yourself how it will be for the weird viewport sizes that don’t fit the typical mould? Always try to simplify and condense content to make it useful for everyone."it's really not that complicated. keep the amount of crap (stuff that can go wrong) like animations, weird font sizes and font faces, javascript to a minimum. and dont do stuff like hijacking the scroll, zoom or other common behaviours. just dont do anything unless you absolutely have to.but thats why the web is such a hostile platform. difficult to manage high user/client expectations with pragmatism.